Quote:
Originally Posted by marsheng
New to this forum. My 'new' 1998 986 speedo reads under by 10%. I wondered why everyone was passing me when I was sticking to the speed limit.
I can correct the speedo by using 18" rims instead of the original 16". Just wondering if the 225x50x18 will fit in the body shell.
Thanks Wallace
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If it is for the fronts, there is no way 225/50/18 will fit, that tire has a 26.9" diameter (vs. approx 25" diameter for stock sizes) and will hit the lower spring perch (if you have OEM struts) in the front for sure, and probably the back too.
Edit - and my digital speedo consistently reads around 3 mph faster than actual, measured at highway speeds (70 mph). I haven't measured it at lower speeds like 35 mph.