Originally Posted by kobeballer96
Will the same apply to 18x8.5 et40? I, looking at rpf1s and trying to find a happy median for tires. Was thinking 235 square.
That is correct, the same would apply with the 18x8.5" ET40. The only difference is depending on your tire size for the 18" diameter, the rolling diameter might be a bit taller than the 17" version with the same width, and can cause rubbing issues. For example, a 235/40/18 is a full inch larger in overall diameter than the 235/40/17, while the 245/35/18 is a very rare size, but is only 0.1" taller. The 245/35/18 is also only 0.1" taller than the 245/40/17 tire size.