Twistee 404 Report post Posted August 15, 2021 Can anyone explain why BMW spec'd the rear tires as 275/35 r19 on the wagon and 285/35 r19 on the sedan M5? I just had the rears changed to the factory size and there is a large amount of room for the 285 - so rubbing can't be the issue or smaller wheel wells. I've searched the web and couldn't find anything conclusive. Quote Share this post Link to post Share on other sites
andrewm 236 Report post Posted August 16, 2021 (edited) Only reason I can think of is sidewall strength. A 285 on a 9.5 inch rim is above recommended maximum width, perhaps they figured someone putting a wagon sideways with 4 passengers and the extra luggage capacity was a bad idea on oversized tires. Or the 275 has a higher weight/ load rating. Edited August 16, 2021 by andrewm Quote Share this post Link to post Share on other sites
BreakMyWindow 1870 Report post Posted August 17, 2021 maybe a skinnier tyre on the rear helps combat the wagons tendency to understeer more than the sedan ? Quote Share this post Link to post Share on other sites
