2005 BMW M3 COMPETITION PACKAGE · E46 · VERIFIED ON SEP 4, 2026
255/40R18 is a listed alternate for the 2005 BMW M3 Competition Package: 661 mm rolling diameter (26 inches), -0.2 % versus the 225/40R19 factory tire, inside the 3 % limit. Sidewall 102 mm versus 90 mm. No tire in our capture is priced in this size for it.
255/40R18 is a listed alternate for the 2005 BMW M3 Competition Package: 661 mm rolling diameter (26 inches), -0.2 % versus the 225/40R19 factory tire, inside the 3 % limit.
Rim width range on this car: 8–10.5 inches; offset ET20 to ET47. Whether 255/40R18 rubs at full lock depends on the wheel it sits on and the fender — not in our data; the diameter math above is what we can back.
Fitment is computed from published vehicle data and the retailer's listed sizes (catalog 2026-09-04-tirerack-d, verified on Sep 4, 2026). Prices are list prices on that date. Verify with your installer before you buy. Buy links may be affiliate links.