Quote:
Originally Posted by shashankmittal
Thanks a lot for the responses guys!!
Does anyone know if the following staggered sizes will work with X5:
1st option:
Front wheel 22x9.5 : 275/45/22
Rear wheel 22x10.5 : 305/40/22
2nd option:
Front wheel 22x10.5 : 285/30/22
Rear wheel 22x12 : 335/25/22
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Since the non-sport model comes with 19" non-staggered wheels you can't really compare. So a more realistic comparison would be with the staggered 20" setup which comes with 275/40/20 front and 315/35/20 rear.
The idea is to keep the same over all dimensions. So obviously the larger the wheel, the smaller the sidewall tire size! There are several 'tire calculators' online where you can plug in the 20" tire sizes and your new tire sizes you are looking to buy. I did a quick claculation with your option 1 sizes and as you can see below, they are completely out of whack!!
Original tire
Sidewall: 4.33 in
Radius: 14.33 in
Diameter: 28.66 in
Circumf: 90.04 in
Revs/mile: 703.67
New Tire
Sidewall: 4.87 in
Radius: 15.87 in
Diameter: 31.74 in
Circumf: 99.73 in
Revs/mile: 635.33
Speedometer reading with new tire is 10.76% too slow.
When your speedometer is reading 60mph you are actually traveling 65.83mph.
Finding a tire size that will work is one thing, actually finding a tire that size that someone makes is almost impossible! I gave up trying to find 22" tires and throw everything out of whack...decided to go with the recommended 21" staggered setup instead.