Quote:
Originally Posted by JB-A
yes - 21'' isn't the problem - there the staggered ones are available (285/35/21 & 325/30/21)
http://www.tirerack.com/tires/TireSe...r=21&zip-code=
I was also looking for staggered 20'' - there the situation is different:
1) the standard summer OEM 20'' are 10Jx20 at the front and 11.5Jx20 at the rear equipped with 285/40/20 & 325/35/20
2) the OEM winter tire set is using 10Jx20 at the front (so obviously the same as summer) but 10.5Jx20 at the rear and is equipped with 285/40/20 on all 4
3) for F16 BMW offers staggered ones (10J & 11J - 275/40/20 & 315/35/20) - but as we know the rims don't fit on our F86s and these tire sizes are also not approved by BMW for F86
4) so I checked to order the 1) summer OEM 20'' and equip it with 285/40/20 front and 325/35/20 rear - but the problem is that there are no winter tires available in 325/35/20
see Tire Rack: just 1 summer tire: http://www.tirerack.com/tires/TireSe...r=17&zip-code=
also my dealer confirmed that there is no winter tire available in this size
conclusion: 285/40/20 on all 4 or OEM summer with 285/35/21 & 325/30/21 |
Your conclusion is incorrect.
You can run 1 width size smaller on OEM 20s, not a problem. 275/40/20 and 315/35/20 will fit perfectly on OEM X5M/X6M 20s without any issues. You can mount 315 on 10.5-12.5" wide wheels. Not sure what you mean by "not approved?" They're approved by the tire manufacturer and running the same size as the F15/F16 20s will put you the same rotational diameter front/rear. As long as the front and rear have the same rotational diameter it will not trip any MDM/DSC errors.
The OEM F15/F16 wheels also have 74.1 inner bores ans similar offsets. It should fit as those guys run OEM X5M/X6M OEM wheels. You can add spacers if needed to better clear our larger calipers, but not required.