07-10-2014, 02:13 PM
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#12 (permalink)
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Track Member
Join Date: Jan 2011
Location: los angeles
Age: 39
Posts: 933
Drives: 370z, EK Civic, F150
Rep Power: 16
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Quote:
Originally Posted by synolimit
i think i have question though. since some run a smaller front wheel like me, would it make more sence to not run square? a smaller width can lower the tires width no?? so 295 front and 285 rear might make it more square then 295/295 or 285/285??
PS, money aside i still want to test all setups. i get the square but i just LOVE a fat rear. i really want to test 285/285 and maybe 285/315
acutally i just looked at tire rack, in a A6 id have to run 295/30/18 and 315/30/18 to keep the diameter close. it may not be square but the smaller front wheel its mounted to would bring the diameter closer together. so it really wouldnt be a true 20mm gap.
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basically if the wheel is too narrow to support the tire width properly, which i feel 9.5 is too narrow for 285, then the sidewall dynamics are not ideal. the tire contact patch doesnt produce grip until the sidewall is in tension. this is why i like to run with a slight stretch to "preload" the sidewall tension. when you run too narrow, you increase the sidewall tension delay. also when the tire is to wide for the wheel, the contact patch shape gets rounded.
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