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Originally Posted by ricky.agrawal
DinanX5, I'm looking at www.tirerack.com on a 2004 X5 4.4i (pretty much the same car as yours) and 20x10.5 all around is fine. Even 21x10.5 all around is fine. However the tire sizes they suggest aren't the same as 315/35/20 all around.
Tirerack says:
20x10.5 = 295/40/20
21x10.5 = 285/35/21
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That is encouraging...
I've wanted to do 10.5s all around for a while now, but I was under the impression that the fronts would rub. (And I could've sworn Tire Rack was one of the nay-sayers... ) I've always thought that the same size tire all around was the best way to go... I want just as much grip in front as in the rear (of course, my camber plates are a big help with that

)
Anyway, my personal feeling is that I'd rather do 295/40s than 315/35s because the the 295/40s generally run about 1/2 inch bigger in diameter. (And while 1/4 inch of additional sidewall height doesn't seem like much in terms of additional road hazzard protection, I think every little bit helps!) The only down-side - and again, I imagine this is pretty minimal - would be that a larger diameter tire/wheel combo will be slower accelerating... plus they might be a touch heavier.
But my thought is that 295s all around will handle and look fantastic!!!!!
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Originally Posted by jmh
...20x10.5's will fit fine with 315's all around. No rubbing or any other mechanical issues. Dinan actually considered to sell their supercharged 4.6 kit with 315's all around but decided against due to supply issues of 315's...
- Jan
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So what do you think of the ride with this setup, Jan? I know they're 'winter' tires and all... but having that much rubber on the ground - particularly in the front - must make her grip like a track car!
