Quote:
Originally Posted by E30 Racer
+1
Would also be interested in hearing how pronounced the effect of the smaller rolling radius of the rear tires is (i.e., on effective gearing).
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Not to hijack, but I am running a square setup 275/35-18 on the rear which is about 1/2 inch smaller diameter on the back. The added gearing is definitely noticeable, second gear is a hoot! My speedo reads about 7% low. My stock wheels have been used with 275/35-19 on the rear and that actually made the speedo perfect. The factory tires read a little low.
My factory wheels are going to get refinished, and I am planning to keep using 255/35 front and 275/35 rear.
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1M track toy mods: BMS chargepipe, BMS OCC, ADE FMIC, ADE motor mounts, MadDad/Lightweight Ti exhaust, ADE custom oil thermostat/cooler, custom MHD tune, F10 550i clutch, Ohlins R+T, Vorschlag camber plates, M3 'vert FSB with Turner endlinks, Stoptech Trophy BBK.