I am getting some 18x8.5s sometime soon. I plan to get Azenis tires. Which size would be better? 245-40-18 or 255-40-18? I did the calculator and both arent the same size as the stock circumference. 255-35-18 is ideal but the tires that come in that size and are awesome are near 1000+.

 

Today I mounted a set of Azenis RT-615 245/40-18 on 18x8.5 rims, perfect fit. I was thinking about going one size wider (255/35-18) but all tire manufaturers (Falken included) recommend that size for rims 9" wide.

 

you can mount 255s as long as you don't rub