[flyguy]

Unless I am making a mistake isn't the best % combination for xi with 19's a 225-35R 19 on the front with 265-30R 19 closer (better) than using a 235 on the front? Seems that way on Tire Rack specs. Am I wrong? Was going to get 235 for front but now I am questioning that?

[jgalaxy]

The OEM staggered setup on 18s is 255/35/18 and 225/40/18 and 19s are 255/30/19 and 225/35/19. That is reference that can be put thru any tire size calculator (The Tire Rack forum here has one).

I have 265/30/19 and 235/35/19 (10.5" and 8.5" M1 replicas) - Tons of understeer. Looks nice though.

The key is to maintain the run diameters as close to OEM as possible and to keep any % difference between front and rear run ratios as close to zero percent as possible.

This is a good tire size calculator
http://www.1010tires.com/tiresizecalculator.asp

[Ph0zenstone]

i have 225/35/19 up front and 255/30/19 which is the oem tire size. you're best bet is to stay as close to that as possible to net you the least % variance.

[JaysBlueE92]

I actually think 235/35 up front and 265/30 rear is the recommended setup...

[Ph0zenstone]

Originally Posted by JaysBlueE92

I actually think 235/35 up front and 265/30 rear is the recommended setup...

i thnk thats the recommended setup per Tirerack but thats not the oem size. I think its still under 1% for both of them but the 225/35 and 255/30 is closer to 0%.