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Old 19th August 2005, 10:13   #1
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Question Tyre Size

I was thinking today that if you upsize your cars rims and still keep the same thickness of rubber, shouldn't your mileage increase? Admitted you'd get incorrect figures on your odo, but it won't stop your car moving a greater distanc than in stock configuration.

Lets take, for example, my car - Honda City. 13" rims. lets say 2" rubber. total = 15".

hence, I move in 1 rotation of my wheel a distance of 2*3.14*38.1 (as 1 inch = 2.54 cms.)

hence total distance moved in one rotation is = 239.27 cms.

If I upsize my tyres to 15" and keep the same thickness of rubber, then I efectively have 17" as my radius. so, the new distance travelled is = 2*3.14*43.18 = 271.17

sso I do get better mileage as for the same rotation, I move more. also, the more rubber you have on your tyre, the more commfortable the ride. so why does no one do this??!
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Old 19th August 2005, 10:54   #2
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Quick get me Monster Truck tyres
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Old 19th August 2005, 16:16   #3
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Handling and weight.
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Old 19th August 2005, 16:30   #4
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Quote:
Originally Posted by aveek
so I do get better mileage as for the same rotation, I move more. also, the more rubber you have on your tyre, the more commfortable the ride. so why does no one do this??!
Bigger the tyre, more torque is required to rotate it. So you may have to press the accelerator harder to get the same rotation, your mileage may actually come down.
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Old 19th August 2005, 23:02   #5
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@samurai: How much more torque can it take? The 15" alloys shoould be ingter than 13" steel rims, so shouldn't it take the same amount of torque - basically cancel it out?


@nishant: I always thought monster wheels were neat - now we've got another reason tto put em on!! :P
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