Thread: 15" vs 18"
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Old 02-13-2014, 02:44 PM
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Location: Tempe,AZ-High Point,NC, AZ
Cobra Make, Engine: Kirkham #684, 482FE, Mike Mccluskey build
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Quote:
Originally Posted by Cobra #3170 View Post
You put him on 18" Hoosier A6's with proper camber and spring rates and he would pick up 6 seconds a lap. I ran 15" back when they actually made good slicks for 15's (1970's), LMS 16" slicks in the 1980's and 1990's on wider than stock rims (9.5 F and 11 R) and now 18" on (11" F and 12" R) and I can tell you there is no comparison. Yes, part of it is modern compounding but the steering response is so much more precise with low aspect ratio's I would never go back. There is also the problem of tire distortion under high loads
with large aspect ratios especially with poor suspension geometry. There is a reason that the automobile and tire companies gravitated toward larger wheel diameters, they are better.
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