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I can't figure out which tire size to choose. Yes.. I have been through the stickies.

I just purchased a set of 17x7 HFP wheels and I want some nice shoes, for them. I have read amazing reviews about Goodyear Eagle F1 All Season, and have decided that they are going to be my tire of choice. However... I'm still up in the air, about tire size.

I really want 225/45/17, but I'm worried about a couple things. The tire diameter is about .5" more than stock. Some people seem to think this will effect my 1/4 ET. (every little bit counts) However, wouldn't the extra grip help in the launch? Thus improving my 60ft? After the tires, my next purchase is going to be BC coilovers. I want at least a 1.25 drop on the car, and then I'm afraid I might have rubbing issues. However... I can't find any information confirming or denying this.

I'm halfway thinking about being better safe than sorry, and going with 215/45/17. :(

Any help is appreciated.
 

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i just plugged the numbers into a wheel-tire calculator and the difference in diameter is only 1.3%. i wouldnt imagine that would affect gearing much at all. it throws off your speedo by <1mph for every 60mph. if anything it may account for a 0.05 gain in ET lol. if even that.

also when it comes to the 225 getting you more grip over the 215 in drag.. yeah, thats true, but even that is pretty negligible if you use a good grippy tire. the 225 will also have more friction and inertia.

this kinda reminds me of all the dudes who strip out there back seats and stuff when they go to the track. they may save 50-60 pounds but, really, what is that off of your et? 0.05? 0.1 at the most? increasing your driving skill, esp the launch, is the best way to lower your times :smile:
 
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