TrafficSafe Investigates Riding on the Dark Side

By Jonathan Newell

With National Tire Safety week beginning soon in the USA, TrafficSafe specialists urge riders of large motorcyclists not to use a car tire on the rear wheel, colloquially referred to as the Darkside.

A major online tire retailer in the USA recently published a recommendation to riders of Goldwing and Valkyrie motorcycles to use a Michelin car tire on the rear wheel , quoting advantages such as improved comfort and traction with less effect from road gravel on handling.

The website reassures “darkside” riders that the practice is safe and that the 195/55R16 Michelin Primacy Alpin PA3 ZP is the ideal tyre of choice for the owners of such motorcycles.

The choice of tyre for motorcyclists is particularly critical to ensure safety and there are many factors to consider. Sidecar outfits and custom three-wheelers have special considerations and there may be circumstances when the choice of a car tyre is feasible but for solo motorcycles, the weight of technical opinion from experts is overwhelmingly against the practice of riding on the darkside.

TrafficSafe’s vehicle construction and use expert said, “Motorcycle tyres are constructed differently from car tyres to cope with the kind of side loads that are normal for a motorcycle but would be absolutely abnormal on a four-wheeled vehicle. Car tyres are simply not constructed to take sustained lateral loading to the extent experienced on a motorcycle during cornering. My advice to anyone contemplating using a car tyre on a motorcycle is simple…. Don’t do it!”

We spoke to TyreSafe, a UK non-profit organisation dedicated to raising tyre safety awareness and campaigning for the safe use of tyres. Their spokesman told us:

“A car tyre is not designed for the conditions of use of a two wheel motorcycle. A car tyre develops its cornering force by having a slip angle applied to it, and is not designed to run at the sort of camber angles encountered on a motorcycle. A motorcycle tyre is designed to develop camber thrust as the bike corners at significant camber angles, and it has a profile adapted to this.

The use of a car tyre on a two wheel motorcycle would in our opinion lead to unpredictable handling and cause rapid deterioration in the shoulder / sidewall area leading to possible tyre failure with serious consequences. Motorcycle wheels and car wheels differ in profile, and it is essential that the tyre and the wheel are compatible. Car wheels are not compatible with two wheel motorcycles.

In conclusion, we feel that the use car tyres on two wheel motorcycles should be strongly discouraged.”

TrafficSafe examined the following video footage of a car tyre being used on a solo motorcycle and shared it with other experts in tyre safety. We noted the following points:

1 The tread pattern is designed for car use with the maximum volume of water being displaced when the tyre has flat contact with the road surface. Angling the tyre into corners has an enormous impact on the tyre’s ability to displace water on a wet road surface.

2 As the motorcycle leans into the corner, the tyre presents less surface area to the road, reducing the contact patch at moments when firm contact is most needed.

3 The tyre is over-inflated to 40psi, presumably in order to change the tyre profile to make it less square and thus improve cornering performance. Sudden loss of pressure from 40psi would have a devastating effect on handling.

Since the US online tire retailer had quoted a Michelin car tire as an “ideal example” of what to use on a motorcycle, we spoke to Michelin directly and showed them the YouTube video. Michelin had this to say:

“Using a car tyre in the way illustrated in the video could result in rapid deterioration in the shoulder and sidewall area due to the abnormal flexing which the tyre will undergo, and so in our opinion running car tyres on two wheel motorcycles should be strongly discouraged.”

Finally, we spoke to a UK insurance company on whether fitting a car tyre on a motorcycle would affect any claims. The spokesman said “Such a change to the standard specification of the motorcycle would require prior approval from the insurance company otherwise the policy would be invalidated. In the event of an accident, the rider would lose the right to claim on the insurance. Under current UK law, the insurance company would be obliged to pay third party claims if the motorcycle rider was at fault but the insurance company would rigorously pursue subsequent compensation from the rider at fault”.

We also spoke to the largest insurance company in the USA which specializes in motorcycle insurance who declined our invitation to comment. TrafficSafe would therefore recommend that US motorcyclists check their policies and enquire with their insurance provider regarding the validity of their policy before fitting non-standard equipment to their vehicles.

Given the overwhelming weight of opinion against the use of such tyres for two-wheeled motorcycles, TrafficSafe urges motorcyclists not to be deluded into believing that riding on the darkside is safe. Websites and forums promoting such a riding style have a duty of responsibility to put the record straight. TrafficSafe particularly urges the US online tire retailer to retract its public statement encouraging darkside riding and to fulfil its duty as a responsible tire supplier by not marketing car tires to solo motorcyclists.

Jonathan Newell

Studied Engineering at Loughborough University and now involved in broadcast and technical journalism. Jonathan is based in London and Almaty.

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33 Responses to TrafficSafe Investigates Riding on the Dark Side

  1. jnewell says:

    TrafficSafe is extremely pleased that the US tyre supplier referred to in this article has fulfilled its responsibility to the motorcycling community by issuing a statement withdrawing its claim that the Michelin Primacy Alpin tyre is suitable for use on a motorcycle rear wheel.

    After reading the article, watching the video and making its own consultations, the online tyre supplier does not recommend the use of car tyres for use on any two-wheeled motorcycle and doesn’t believe that riding on the Darkside is a safe practice.

    • Steve Thompson says:

      Unfortunately, in every category of product safety, there is someone who will focus on the possible dangers of just about anything. Experience and test results have much more value. The credibility problems and lack of real data exist on both sides of this issue. So in an effort to help my brothers of the two wheel world, here is some experience that is based on fact, and disagrees with pundits on both sides of the issue:
      1) Motorcycle tires are inherently unsafe. The MC tire industry has done a lousy job of producing a quality product using the latest technology and are light years behind the car tire product developers.
      2) I, like many others tried the dark-side due to multiple tire failures on my GL1800, despite the fact that I am a maintenance and specification fanatic. Problems encountered included valve stem failure, blowout, punctures, cupping (causing loss of traction), poorly balanced and out of round tires, poor handling, poor traction, rough ride, and visual defect. All of these occurred since 2008, using oem spec products, running correct pressures, on normal road surfaces at specified speed limits. Each of these problems present consequences that can be far more severe to a motorcyclist than an automobile driver. All of these problems occured on the rear wheel, some on the front. So for me, going to a steel belted run flat M/S radial on the rear automatically created a significant increase in safety. No M/C tire has the same characteristics. I have not had a failure on any of the 5 car tires I have run nearly 100,000mi (Kumho ku31 & Michelin primacy Alpin pa3).
      3) There are smart people that look for sensible solutions, and stupid people that do stupid things. This is no different. Don’t buy a rear car tire for your MC for economy. Buy it for safety. Some of the MC riders have been buying cheap regular car tires for under $100 as an economy move. Stupid! It only helps with 1 safety issue; punctures (if it has steel belts) and, just like on a car, you get what you pay for. Cheap = substandard performance. The only problems I have heard of with the darkside were the idiots that ran the non run flats, and wore out the sidewalls in the twisties. If you want to drag metal in the corners, the darkside is not the best solution. If you run the curves at up to 20mph more than the yellow sign says (recommended speed), the Run flats work fine, unless you over inflate them, in which case, you will run on the sidewall and create premature wear. The two tires I have used work well at 30-32psi on the GL1800 in all conditions, and my wife doesn’t miss standing on the side of the road, or riding through a ditch at 65mph with a blowout.

    • Bryce Patrick says:

      I tried the Darkside on my Yamaha Stratoliner with a less than positive result.
      I thought I would try it after several threads promoted the Darkside on a Stratoliner Forum that I subscribe to…I have come to the conclusion that these guys that promote the idea must be frozen from the neck down, or they would not promote this to others.
      That car tire changed the way my bike handled in many ways…none of them for the good!
      Here is my comment to another rider who was not happy with his new C/T install on HIS Stratoliner:

      “I am going to get some more negative blowback for what I am about to say, but I am okay with that…I firmly believe you should have the benefit of my experience, on some of the things you are experiencing with the car tire….I know what is going on with your bike, and exactly why it is happening….It is all related to the flat profile…With MC tires your bike is roughly tracking a single line regarding the bike’s center of balance, but with a C/T on the back the contact patch shifts back and forth across the 8 1/2″ width of the tire as the bike leans into turns, upsetting that center of balance…The wide flat profile is also affected by patched and uneven pavement…in other words if the left side of the wide tire rolls over a raised patch of pavement…your bike will steer right and vice versa…this gives the bike a greasy unstable feeling…The reason the bike resists turning is because once the bike leans…the contact patch of the rear tire shifts 4″ off center…shifting the bikes center of balance in the opposite direction….The contact patch of MC tires shift back and forth as well but roughly the same center line front and back so the bike maintains a stable center of balance…Hope this helps…

      Give it a try…you may very well get used to the way the bike feels…if not…so be it”
      The one thing I did not mention to that rider…the bike had a severe high speed wobble that was not there with a motorcycle tire mounted.

      • Bryce Patrick says:

        An Added note…What was your original reason for buying a motorcycle…if it was to save money on your commute…go buy a hybrid car…if it was to Enjoy your commute or to explore the beauty of the countryside, don’t destroy your bike’s well engineered balance by putting a tire on it that was meant for cars…NOT MOTORCYCLES…period

      • Gerald Wurst says:

        Funny, Yamaha V Star 1300 and went dark side and loving it. Following the threads here and when I read yours I think of a previous comment- you get what you pay for. Mine is a Michelin Primacy at 32 psi and my ride is sweet. I live in the Philippines and ride in tropical storms, roads under construction during same. Uncomfortable yes, safe yes. MC tire skidding everywhere when forced to do same. Car tire nice and square fat ass feeling. So I be thinking poor quality tire, over inflation or other factors but for me- never again a MC tire. N twisties- loving them.

  2. sumncguy says:

    Well …

    The 2012 goldwing is just about 1k pounds. The best motorcycle tire as far as load is the Dunlop e3 which is load rated at 991 pounds.

    This is a REAL issue.

    Is it better to overload the motorcycle tire or ride the Dark side ?

    What do you have to say about this ?

    What studies have been done to back up what you are saying ?

    • Steel Horse says:

      Motorcycles have two wheels, with the weight of the motorcycle, rider, pillion, and luggage divided between them. The load on the rear tyre will be a portion of this total load, not the whole, with the front tyre also taking its share.

      Unless you only use your 2012 Goldwing for wheelies, or you habitually overload the bike beyond the manufacturer’s recommendations (which will be in the manual, as will be recommended tyre specifications) you should be fine.

  3. sumncguy says:

    and you should also have your facts straight. The Max pressure for the Michelin Primacy Alpin PA3 ZP is 51 psi ! 40 lbs isnt over inflating the tire !!

    • Steel Horse says:

      It’s true: you can run this tyre at up to 50psi. On a standard car though tyres tend to be inflated to 28-32psi, with some variation outside that. In that context, at 40psi the tyre is overinflated relative to its normal use. Perhaps the article could be more explicit about that, but the point still stands.

      • Boomer says:

        My recommended PSI is 44PSI for my motorcycle tyre (tire) which is unsafe right? Therefor a car tire (tyre) inflated to only 29-34 PSI is more safe in case of failure! (Per your comments). The fact is that car tires (tyres) hold up much better to the stresses of large motorcycles. Racing and sport type motorcycles will never run CT due to the stresses you mention. But there will continue to be a large amount of large motorcycle owners switching to CT for the benefit of better manufactured products. And when the engineers can explain to me how a camber action vs lateral G creates higher stresses, I will consider switching back to MC tyres (tires). And just how many accidents have resulted from darkside riders tyre (tire) failures? Zero that I am aware of.

  4. jnewell says:

    Thanks for the link to the article, it was an interesting anecdotal treatise of one guy’s experience of riding on the dark side. However, my point doesn’t change.

    The writer’s experience of 100k miles with a car tyre on the back doesn’t tell me it’s safe. There are people who’ve smoked for 60 years and died happily at 95, it doesn’t mean smoking’s good for you.

    The debate on dark side riding is very controversial and is dominated by safety advocates on one side and passionate enthusiasts on the other. There is very little middle ground and so the divisions are wide but the debate should nonetheless be rational… from both sides.

    TrafficSafe’s take on this is that in the absence of objective test data, motorcyclists shouldn’t take the risk.

    If car tyres can be used on motorcycles then there should be type approval for them (there isn’t). Without type approval, how does the average consumer (by which I mean people without the level of experience of the article’s writer) know what tyres match what rim sizes, what inflation pressures to use, which tread patterns work the best, whether it can be used on a front wheel and whether it can be used on sports motorcycles with higher cornering angles.

    In short, the limits should be defined but they’re not.

    Dark siders are one very small subset of the vast motorcycling community and it’s that wider group of people that we’re trying to reach with the message that without extensive testing and type approval, don’t put car tyres on your bike.

    • Zachary Greene says: Here is some info that maybe useful.

    • James says:

      Actually the debate is dominated by those who have tried it on one siiide and those who have not on the other. I haven’t tried it, and am therefore not opposing it, even though it seeems crazy.

      I am, however, looking for anyone who has tried it and found a problem. There doesn’t seem to be any.

      I read this article thinking from the title that it would be an actual investigation (you know – with testing, experimentation, data etc) but no, its just another expression of opinions from those who have not seen, let alone tried, what they’re opining about.

      • kevin jolly says:

        I have tried it, just this week. I have put 180 miles on my 1986GL 1200A goldwing. I live in texas and drive highway miles most. I can tell you that it is scary. My bike feels lose on the road, and it sways back and fouth over 60 mph. I am told by other dark siders that this is normal. To put more air presser in the tire. Have not tried that yet. I put 20,000 miles on my bike or more each year. Two tires a year or one every two years. that is alot of money. I’m still up in the air over what i am going to do. Slow down or stay scary.

  5. Mike Woodley says:

    over here in the UK its normal practice to fit a car tyre on the rear of a motorcycle and sidecar. I have been running a GTR1000 Kawasaki outfit for 18 months and scrub out a standard 150 80 16 in around 3000 miles. I am about to change to a 165 70 16 car tyre. I have made this choice because I discovered reducing rear tyre pressure to 30psi seems to improve the low speed stability, in addition the 16 inch car tyre seems a good match for the motorcycle rim. I already run the standard front tyre at 22psi and the next mod, assuming car tyre fitments at least as good as the rear bike tyre, will be to increase the width of the front tyre to 120 with as low a profile as I can get. Any tips or genuine comments direct to my e-mail would really be appreciated.


    • Nick Hendley says:

      Mike I started out on combos and in those days the sidecar tyres were near enough flat in section. The first machine I had was a BSA M21 and it had a 10″ wheel on the sidecar with a cross ply, the front was a Firestone sidecar tyre and the rear was Dunlop K70 not quite flat but close. My next outfit was a Norton Dommie and when we bought it it was fitted with a Michelin on the front and a Avon SM. Again the sidecar had a 10″ wheel and was fitted with a cross ply. It was later fitted with a 19″ tyre off an Austin 7. The chap that gave me it used to use them on the back of his sprint solos.

      I would not recommend going down too much with the pressure as this causes excessive flexing and will overheat the tyre. I was advised a long time ago by a development engineer who worked at Fort Dunlop that tyres needed to be adjusted according to conditions. High speed work he recommended increasing the pressure, lowering the pressure helps increase grip but he recommend tyre clamps. I fitted these to a tuned CB750 as I had torn the valve out of the tube a couple of times.

      My experience with running on the Darkside started in 2015. I had worn the rear tyre out on my Honda V45 Super Magna. It had lasted only 4k and although it had worn fairly evenly I was somewhat disappointed and the prospect of spending yet another £120 did not fill me with glee.

      After doing a lot of research, watching You Tube videos and following blogs from various Darksiders I decided that it was worth a punt. I settled on a classic Vredestein 155/80 R15 designed for classic Jags, etc. The profile was not that different from the Avon SMs I had used on my solos in the 70s.

      It was £37 +vat I also invested in a Chinese copy of a Metzeler £27.50 +vat
      The rear tyre was a bitch to fit and the local bike shop gave up. I persevered and it did go on. That was 11,000 miles ago and what can I say? Well it feels different to the Maxxis that was on before, but it still goes round corners nicely, I still find the pegs grounding as they did before. I had to play with the pressures, I started off with 34 psi and it was not nice. The bike squirreled about, I increased it to 37psi and this is great solo, I increase it to 39 psi with a passenger. The tyre is now half worn and it certainly looks as though I it will do about 20k. Having had this experience I am going to try it on my other V4 as that chews a rear in less than 3k, This time it will have to be a more expensive tyre as VMax is a lot heavier and shoves out three times the torque.
      I am building an outfit and have fitted it with smaller diameter wheels so that I can fit car tyres all round and also lower the gearing without having to resort to changing the crown wheel and pinion

  6. Juan Arturo says:

    It will be helpful for us to know how many MC accidents has been caused by the use of a CT on the rear of a bike. If someone has access to that statistic, please share with us.
    One thing is for sure (I did test it), with a CT on the rear of a bike, one could apply the rear brakes to all force without having any tailing on the bike or loose of control of it.
    When riding a MC danger is everywhere around one. Most accidents are caused by “cagers” hitting bikers than from tire failure. IMHO

  7. GaryODS says:

    An interesting article.

    “3 The tyre is over-inflated to 40psi, presumably in order to change the tyre profile to make it less square and thus improve cornering performance. Sudden loss of pressure from 40psi would have a devastating effect on handling.”

    I’m assuming that the blogger does understand that the tire he is referring to in the US is a ZP, capable of running 50 miles @ 50 MPH with no air in it?

    In my experience it’s not the shoulders that wear out first, and I’m running mine at 32 PSI with approximately 25K miles on it and I’d guess that it’s got an additional 10K – 15K left to go.

    This isn’t for everyone, there are handling characteristics that are different, but for me they just became the new normal.

    I really don’t care what he, or anyone else chooses to ride on – whatever trips their trigger. For me I actually feel safer on the CT, and on long touring rides in remote area’s I certainly like the option to go to the closest car tire dealer instead and get back on the road instead of waiting for days or more for a tire to arrive.

    Ride Safe

  8. Bill says:

    This reminds me of the old line “you can’t fix stupid”.

    The biggest and most valid reason not to put a car tire on a motorcycle is the rim bead on a motorcycle and a car are different and not compatible. Then you have the handling issue, a tire is not designed for motorcycle and even in this comments section it has once again been admitted that it changes the handling and it is never for the better. Everyone who uses a car tire says that yet they still do it all to save a few dollars on the cost of a tire.

    This is what it all boils down to is owners who cheap out. Maybe a better path for those owners would be to sell their motorcycle if they can’t afford to put the proper tires on it.

    If car tires were so great don’t you think all the motorcycle manufactures would put them on from the factory?

    There was a time when some motorcycle tires had a square tread profile. Bike back then were not as powerful and did not handle as well as bike today do. Tires were have evolved to the design they are today because that is what works best and is safest. The tire engineers figure out that a square tread design was just not the best solution for a motorcycle.

    I will happily but motorcycle tires and enjoy the handling that was engineered into my touring bike rather than to degrade the handling.

    I think the only thing that has saved those who have switched to a car tire is street motorcycles are designed to only lean up to 45 degree with many not even able to reach that amount of lean angle. Racing motorcycles are designed for lean angles up to 50 degrees before hard parts start to scrape.

    In my opinion it is completely stupid to buy a 20,000 to 30,000 dollar motorcycle and then put a car tire on it and alter the handling in a negative way.

    Goes back to “you can’t fix stupid”.

    As for the comments about crash reports documenting crashes of bikes with car tires, in the United States police crash reports are not designed to capture that data so there could have been a few hundred crashes involving motorcycles using a car tire and we would never know because the data is just no captured on the crash report.

  9. Hack says:

    So, it’s not safe to run a car tire on a 1,00 lbs or less machine that has 2 wheels because they can’t take the side loads. Explain how the car tires can withstand this.

    • Steel Horse says:

      Oh boy… Two points:

      (1) I might be wrong but I suspect the rigours of stunt driving require more frequent tyre changes than standard road driving due to excess tyre wear – something to which driving on two wheels would contribute.

      (2) Those guys are driving on two wheels without incident, and it is impressive, but they’re not doing it at highway speeds. Not even close. If I were to run a car tyre on my ZZR 1400 and repeatedly throw it through bends leaned over at high speeds the results would I’m sure be quite different.

      Seriously, tyres are what keep you on the road: don’t skimp.

      • Alan says:

        In reference to going darkside on your ZZR1400 are simular to the so called boffins above in that they are insinuating
        that all motorcycles corner about the same as a MotoGP bike
        some 60 degrees which why they are missing the point of going Darkside most riders that do have motorcycles of limited lean angle my 2010 V-star 1300 has a stationary lean angle of 36 degrees, when loaded and cornering with suspension compression I would be lucky when the footboards scrape to get to 30 degrees! In one article above the writer said that fitting a car tyre was “to save a few dollars” well to put a m/c spec rear tyre on my bike is around $300.00 for about 10000Kms(12mths) as against $100.00. (kumhoK18 205/60-16R92v rated) 40000Kms(4yrs). with max speed limits in South Australia of 110kph on freeways, 100kph off them and mostly 80kph elsewhere with very high infringement cost and very little margin over the limit, I not likely to be testing the limits of this tyre/bike capability.

  10. sumncguy says:

    I have been searching for months to find a single report of an accident caused by a car tire being mounted on a motorcycle. Actually, I couldnt find ANY report whether related to tire structure or road hazard of crashes caused by car tires being mounted on motorcycles. I could however find thousands upon thousands of incidents caused by motorcycle tire failure. Most common being tread separation.

    So my questions stands. Where is the hard data that you base your comments on ?

    Of course the tire manufacturers arent going to be honest !! $$$$$

  11. Rod Stallings says:

    There is just so much wrong information in this article as to make it completely useless. Maybe that is because it is old but still;

    – 40 PSI is far too high for a DS tire – 28-32 is most common.
    – Water displacement – car tires, even on the edges typically have more/deeper tread design than motorcycle tires.
    – Motorcycle and car rim beads are different – please go get two rims and look at them before stating just blatantly incorrect info.

    The true issue here which has not, is not and most probably will not be addressed by any tire manufacture who is selling $280-400 tires in leu of a $90 tire. Car tires have improved vastly over the years. Motorcycle tires have not. You chew up an MC tire typically in 6-8k miles. Yet car tires get a minimum with a really sticky compound of 20k. Do the math. Tire companies want to keep making expensive tires we replace twice a year.

    Someone should really do a proper comparison and not try to make claims based on a single video and not test conditions.

    • jnewell says:

      >40 PSI is far too high for a DS tire – 28-32 is most common<
      That’s what the article says

      >car tires, even on the edges typically have more/deeper tread design than motorcycle tires<
      The profile is different. Car tyres have an “edge”, m/c tyres have a continuous profile designed for cornering at an angle

      >Motorcycle and car rim beads are different<
      Nobody said they aren’t different

      I think you’re actually reinforcing the arguments against using car tyres for DS riding

  12. Gerald Wurst says:

    Thanks Michelin- Riding with Primacy 3 ST. Absolutely love it. Tests be dammed- did my own video, cornering great with more tread on the ground, live in Philippines with torrential rains and first time did monsoon rain through heavy construction – knew what I was approaching and dreading crossing- wow, squared bottom handled the ruts and rushing water fantastic. Group of 20 with sport bike etc. and smoothest transition. CT rock.

  13. Earl Burke says:

    Just wondering what size and make would be the best for darksiding a 2003 goldwing and a 2006 vtx 1800 and what is the best tire pressure.

  14. Pete Yingling says:

    I run a Bridgestone Potenza on my 1800! After SEVERAL test in my own shop I found that I disagree with the contact patch being LESS when cornering as the car tire leaves a MUCH GREATER pattern on the pavement! The m/t wears out in 5000 to 6000 miles and at this point I have 10,000 miles on my c/t and have measured only minimum wear on it!

    • Pete Yingling says:

      Also the bead on the 1800 wheel looks JUST like a car rim. Having mounted THOUSANDS of tire including POLICE CARS TRUST me I look at EVERY RIM!!!!

  15. Marvin Carstens says:

    I have owned a m109r boulevard for the last 7 years, the last 3 have been with a ct on the back. a 245/45r/18 infinity with symmetrical tread pattern. one tyre lasted 3 years, at R1600.00, a perreli nite dragon MT, costs me R2600 and last four months. besides this, I did notice a slight need for more handlebar input on bumpy roads tha a MT, but after a week of getting used to it, I actually realised that this different profile actually made me more aware of road conditions and as such made me a better rider. I tried emergency stops (no ABS on the 109) and it was MUCH better than a MT. Im a cruiser rider, so I would not recommend for sports bikes, but purely for my own experience, the CT handled better that expected. I also noticed for about a week, that the bike felt a little heavy, so checked the tyre pressure, and discovered it had less than 100 bars!!, but still handled OK no matter what speed!! I dont think a MT would have lasted like that. This is just my experience. I would not recommend a CT for Newbies, but for experienced riders. but, each to his own.

  16. Marvin Carstens says:

    well thats a bummer, needed to replace my rear CT (infinity 245/45/18)after 3 years of good service, and these particular tyres are no longer available in South Africa. Of all the tyres they discontinue, they pick this one. all other car tyres I can find of the correct size, all have asymmetric tread patterns, so no use on a bike. had to spend R2500 on a metzler. oh well.

  17. sumncguy says:

    I’m always pointed to this article when I get into the Dark side discussion .. but again, I have not see any data that supports failures related to those riding Dark either caused by tire failure or roadway debris causing catastrophic failure. Any one ? I expect crickets !

    … again.. like so often in our current society. Statements are being made without solid reviewable publish data to back up negative statements. Even by the tire manufacturers.

    Theres plenty of data given by the growing community of Dark riders.

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