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I'm going to picking up some OZ 18 inch wheels soon and looking to get some tires (car will mostly be tracked). The wheels will be 18x8.5 front and 18x10 rear. I'm looking at getting RS3s to start (will go to NT01s later). Should I get the 235/40/18 & 265/40/18 tire combo OR should I get 255/35/18 & 285/35/18. The latter will be 1/2 inch lower than the former. Thoughts....
 

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I have run both the RS3 and Yoko AD08R in the 235/40 and 265/40 sizes on a Cayman R. I went with those as they are the OEM 18in sizes and I knew there would be no problem with fit/ clearance. I like both tires for track although the RS3s are a little cheaper on tirerack. If there is any performance advantage for the wider sizes I don't think I could tell the difference. Going to NT01s is another story. I think most drivers using them go with 245/40 and 275/40 18s.
 

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Nittos are only available in the 275/40 rears, so it makes sense to go with 245/40 fronts. The Kooks are considered by some to be equivalent to the Nittos. Regarding wider sizes; those are usually preferred by AXs compared to trackies.

Just saw that you were getting this P-car. You may want to read some of the threads on here regarding tracking, tires, etc, etc, etc.
 

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Im also thinking of getting 18x10 and 18x8.5 Oz wheels. Im looking at Hoosier A6. Not clear in many of threads what actually works in terms of clearing stock fenders and struts with no rubbing. I was thinking 255/35/18 front and 285/30/18 rear? Should I pickup some 5 mm spacers? Think those will clear and keep proper offset ratio. I will be using car for hillclimbing an occasional track day.
 

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Discussion Starter #6
I'm considering picking up 18x9 for the front and 18x10 for the rear. I think I'll run wider tires so I get better turn-in for the front and more rear grip in the rear.
 

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Im also thinking of getting 18x10 and 18x8.5 Oz wheels. Im looking at Hoosier A6. Not clear in many of threads what actually works in terms of clearing stock fenders and struts with no rubbing. I was thinking 255/35/18 front and 285/30/18 rear? Should I pickup some 5 mm spacers? Think those will clear and keep proper offset ratio. I will be using car for hillclimbing an occasional track day.
You can run 295 Hoosiers without spacers on rear.
 

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I'm also looking for street tires to track, staying away from R comps till I learn the car better. How does the BFG Rivals compare to the HK RS3 or the Dunlop star spec ZII. These are going on a (new to me) E46 M3, but I figure tires are tires. I would be going to a square fitment 265/35/18. Track insurance on the '11 CS was too much.
 

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They don't come much better than Michelin Pilot Super Sports if you're looking for a road tyre for the track imo.
Agree, not the cheapest, but a very strong street / track dual purpose tire. But not for winter street driving...
 
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