Quote:
Originally Posted by GenX3
...So, when the factory tires run down on my 19 wheels, I'm going to replace the back one's with slightly wider tires (275 rather than 245 roughly an inch wider - the profile is pretty much the same).
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Just be sure to fit tires with the correct aspect ratio. i.e.: If you use 245/45's in the front than you MUST use 275/40's in the rear. The X3 MUST must use tires having the exact same outside diameter on all four wheels.
245/45 = 27.7 inches O.D
275/40 = 27.7 inches O.D.
That's an acceptable set up
245/45 = 27.7 inches O.D.
275/45 = 28.7 inches O.D.
That's a set up that will destroy the center differential and front/rear proportioning clutch, as well as activate the ABS and stability control systems.