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I'm currently running a 205/40/17 on my car. It's been lowered 2 in all around. I'm about to buy new tires and was wondering if I could run 45s on them and if so, what width (205, etc). The rims are 17x7s.
Thanks

 
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Yes you can.......and actually 205/45 is the ideal tire size for your wheels. When you switch to aftermarket wheels, you want to stay within +/- 3% of the overall diameter of your OEM wheels/tires.

If you look at this comparison, a 205/40 is actually 3.06% too small (which means you are driving slower than your speedometer reads).

http://www.1010tires.com/Tools/Tire-...0R14/205-40R17


Change it to a 205/45 tires however, and it is only a 0.28% difference, with is pretty much right on the money.

http://www.1010tires.com/Tools/Tire-...0R14/205-45R17

 
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rustycivic gave the correct reply and it answered even some of my queries that I was having. The difference of 0.28% is not much if you aren't going for some upscale and hardcore mods. For other purposes it would just run fine for you. Good luck. :tup fort lauderdale auto

 
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I'm lowered about that far, and I've been rocking 215/45-17s with no issues.

 
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hmm interesting