I have searched but can't find the answer.

I have a 2006 GT Coupe with the stock Ray's 18x9 front and 19x10 in the back. Stock tires are 245/40R18 front and 265/35R19 rear. I need new tires and I was looking at putting 255/40R18 on the front. The 255 will fit the wheel just fine, but I had one tire shop tell me that the tire won't clear the suspension.

I have a hard time believing this but I easily could be wrong. The stock wheel is 25.7 in in diameter, the 255 would be 26 in. Essentially a 1/3 inch difference. As far as width, it is only .4 inch wider. Has anyone put 255/40R18 on the stock 18x9 rims and had any clearance problems?

Secondly, I have the same question for the rears. Has anyone put 275/35 or 285/35 on the stock 19x10 rims?

 

255 should fit.. and 275 and 285 will fit also. many ppl (including me) use 255's on 19x9.5 rims so i dont see how they wouldnt clear on a 18x9. i have 275's on a 19x10.5 and they clear... i also know someone who has 285's on the same rims sized and they also clear, so a 19x10 will work fine

aspect ratio on everything mentioned above is 40

 

The number of potential combinations is staggering:

a. Go OEM plus or minus 10 mm.

b. Keep the rear tires taller than the front.

 

Keep the tire sizes exactly as OEM with OEM wheels.

If you have to be different, then go with a slightly wider rear tire. Like 275 but no bigger..

You don't need to be adding more rubber and unnecessary weight. The stock sizes are adequate for the power you are putting down. If you complain of no traction, it's not because of the tires but because you can't drive.

 

 

Thanks for the replies so far.