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GaryR GaryR is offline
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Originally Posted by Bill Verburg View Post
They both factor is but in somewhat different ways
Bill, I was only referring to the gearing change (in my case) going from an 18" wheel to a 15" wheel on Hoosier R7s, which was substantial. I know you printed out the gearing and accel charts for me back then, I was amazed at the difference on paper and on track.

18" 275/35 R18 -25.5" diameter, 80.2" circumfrence
15" 275/35 R15 - 23" diameter, 72.2" circumfrence
Gary R.
Old 12-12-2018, 01:13 PM
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