Quote:
Originally Posted by nZtiZia
Quote:
Originally Posted by HomeIn2
Still looking to get rid of my factory 21” runflats, and replace them with Michelin Pilot Sport 4 SUV tires with +5 over factory sidewall ratios (e.g. 40 to 45 front, 35 to 40 back).
Any new updates or feedback from those of who’ve gone this route? Anyone notice the extra ground clearance? In the event of a flat tire, would there be any issues with using the factory size 21” spare?
Thanks…
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correct me if i'm wrong, but i believe the factory space saver spare is not 21" but rather a 19" wheel with tire size 155/80R19.
if you replaced all factory tires with upsized 275/45R21 and 315/40R21 then had a flat and used the space saver spare, that's a 6% difference. the xDrive system would throw an error and you could likely cause damage to the drivetrain which would also likely not be covered under warranty because you mounted non-OEM-spec tires. (the difference between OEM-spec 21" tires and the 19" space saver spare is 3%.) |
Most cars don't come with spare don't they?