mortyk

What were stock tires on a 2010 535xi with Sport Package? I just bought one and it has the M rims with 235 45 19 front and 275 30 19 rear. Wondering if they are original. I doubt it as they are Hancocks.

BlaSTiWi

Nope ... none of the xi/awd/x-drive model has 19" wheel as factory option. Sport Package give you 18" and only cosmetic difference no sport suspension.

Also, check again ... the front on 45 profile and the rear at 30 profile??? usually only 5% differences either 40f & 35r or rather the recommended 35f/30r using 245/35-19 front & 275/30-19 rear.

mortyk

will this setup cause any problems, warranty, handling etc.?

BlaSTiWi

On an xi/AWD/x-drive model the rolling diameter of the front and rear must be the same (or very-very close) otherwise it'll damage the drivetrain in turn it'll compromise the handling ('cuz the AWD will be confuse and no idea when to lock etc) and then the warranty coverage will potentially deny claim since the wheel/tire setup are not OEM recommended setup.

As you probably understand the rolling diameter of a tire effected mainly by the sidewall height which is a percentage of the tire width so if you are sure you have such tire measurement in you original post the rear is OK but the front is way off as far as width and height.

When in doubt about calculating tire stuff use = http://www.1010tires.com/Tools/Tire-Size-Calculator

And for reference std 17" tire size = 225/50-17 while Sport Pkg 18" tire size = 245/40-18 front & 275/35-18 rear (hint: see the height diff. between front & rear)

mortyk

I will double check sizes as I was in a hurry when I checked them. Thanks.