Quote:
Originally Posted by MAR
Anone know why BMW puts 215/40/18 front and 245/35/18 rear on the 135 when everyone seems to think 225/255 is better? There must be a reason BMW uses that as the OEM setup.
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BMW doesn't size wheels for the enthusiast, but follows the laws of averages. Some have upsized wheels with some regret, and others love them.
It is purely a personal preference and the compromises you are will to live with.
For my, traction and ride quality was an issue with runflats OEM wheel sizes.
I replaced my wheels with lighter and wider wheels. After 4000 miles, I am a bit mixed. Traction is other worldly, but straighline tracking is a bit iffy and while the ride quality softer it isn't necessarily better without replacing the front suspension with M bits.
I will go back to OEM runflats and OEM wheels after I have blown through this rather expensive experiment in wider and lighter tires.