Does the width of rear tyre affect stability of motorcycle?
The question popped up in my mind after watching the Yamaha R15 - the bike with stunning looks and a thin rear tyre 😡 .
Does it affect the stability of the mobike at higher speeds?
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The simple truth is that a fatter tyre will provided better stability and balance and a thinner tyre better acceleration and mileage, but the tyre used in the motorcycles available in India are too thin. It is as if the companies are more concerned about their profits than anything else. And now tell me, if the thinner tyre had the same level of stability as a fat one, won't they put it on a superbike rather than those huge 200mm tyres.sonasathishi don know what you guys are trying to explain! Do you think that the engineers who designed this bike never had a thought about your point! Sounds crazy
I think it shouldashDon't forget having a thinner profile decreases the drag coefficient too!
I think so, anyway 😉
Administrator • Jul 25, 2008
Yes, they must have thought of it. But you see, understanding why they did it and what they missed - could lead to new ideas & development.sonasathishi don know what you guys are trying to explain! Do you think that the engineers who designed this bike never had a thought about your point! Sounds crazy
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You can modify your bike later. I have a Royal Enfield which comes with a 130mm tyre, I got a 160mm fitted on it. The engine feels no load, it is running as smoothly as before and there is no sufficient dip in mileage.mayurpathakGuys, do you remember Naoya Kaneko's (Kawasaki) interview? He said they first decide the size of tyres before they design a bike.
Fatter tyre is used when you have a bigger engine, since you need more stability. Otherwise the vehicle will lose ground contact. Thinner tyres, however doesn't allow the bike to cruise at higher speed too much. Its difficult to turn the bike at a high speed with thinner tyres. But they are good for off the road biking, unlike SUV's where thicker tyres are used when the vehicles have to go off the road
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Member • Sep 23, 2008
is that the maximum u knew about bikes.. tyre size depends on more than just providing stability. size of the bike also deterimes which tyre suits it better. big(wider bikes) need wider tyres to disrtibute the whole weight of the bike on the road equally so tha one point is not more pressurized compare to the other. the tyres on the R15 are the best that can be given. Karizma R was never faster than the Karizma. I had the old one and it always beat the R in a drag. not to mention the R15 has soft compound rubber from MRF which gives then better grip. wider tyres do not even determin the lean angle. since the angle purley depends upon tyre profile. a 200mm tyre doesnot necessarily provide better lean. The V-rod has a 200mm rear but still doesnt bend as much as the M1 with a 200 mm size..just because of its different profile. And talking about drag cofficient..its almost negligible compared to the total drag of the bike..so engg rarely take that under consideration and that too only for front tyres not rear. if u doubt why superbikes use up much fuell..its only because of the power. 180+bhp doesnt come for free..and to transmit that power from the engine to the road to move forward u need a larger contact area for proper weight distibution.raj87verma88The simple truth is that a fatter tyre will provided better stability and balance and a thinner tyre better acceleration and mileage, but the tyre used in the motorcycles available in India are too thin. It is as if the companies are more concerned about their profits than anything else. And now tell me, if the thinner tyre had the same level of stability as a fat one, won't they put it on a superbike rather than those huge 200mm tyres.
I will take an example of Hero Honda Karizma, the first generation Karizma was 225cc and had the best acceleration among all bikes in India. The next generation Krizma R had the same engine but an even quickr acceleration. There must have been modifications in the engine but the thing that is to be noted is that the tyre was now thinner than the previos version's. Speed thrills and that is why these bikes are making business and also give decent mileage. Frankly speaking the companies are more concerned about their profit, sales than the safety of the riders.
A good example of a bike that had a mindblowing acceleration, good top speed, solid handling and had a not a very big tyre but a decent size is the RD series from Yamaha. RD 350 was availble here but was later banned as it was a 2 stroke.
I think it should
Member • Sep 23, 2008
the handling of the bike depends upon the wheelbase, rake and trail. Motogp bikes have all these adjustable to change the handling of the bike according to different circuits. tyres do affect handling..but thats the last thing on the list that needs to be changedgohmActually it is easier to turn a bike with thinner tires at high speed. Less friction and mass to hinder the re-direction of the gyroscopic forces that cause the bike to lean.
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R-seriesthe handling of the bike depends upon the wheelbase, rake and trail. Motogp bikes have all these adjustable to change the handling of the bike according to different circuits. tyres do affect handling..but thats the last thing on the list that needs to be changed
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