what would be a good tire size for 18x9 up front and 18x10 in the rear.

 

I am looking for the same thing....I will give you a diagram of what I know so far

STOCK 225/55R16
Tire diameter = 25.744

To keep same diameter means no Speedomiter change (these tire ratios are the closest to stock you can get)
245/40R18 in the front (18x9)
Tire diameter = 25.716
275/35R18 in the back(18x10)
Tire diameter = 25.578

The problem I am having is I saw some rims for sale in the parts department of a ford dealership
18x9's and 18x10's they had
245/40R18's on the 18x9's
and
275/40R18's on the 18x10's

I jsut found a set of tires for a really good price look like great tires good reviews etc with the same size's as the dealership rims/tires I saw at1010tires.com they were General exclaim UHP's

ONLY thing is the tire diameter on 275/40R18 is 26.661
1" higher than stock and I am trying to find out if that is ok or not...If you get an answer let me know

 

im running 265 up front and 295 in the rear no problems or bulging bfgood rich kdw