2019 Ascent Touring (CWP)
Thanks for the clarification. If you have five "identical" tires, you're good. Slightly smaller (or larger) is going to affect speedo/odo, etc., of course, and "theoretically" could be used against you if that non-OEM tire size can be blamed for some issue, but lots of folks run non-OEM tire sizes.@Jim_in_PA. I didn't intend to use a different size spare, but your comment about mixing tire sizes can never be repeated too often. I was only checking on which is the widest tire size that is close to OEM diam that will fit in spare tire well. With a 255/55-18 I still get a little more sidewall versus OEM size and an additional 10mm in width. But, maybe I'll need to stick with 245/60-18. I plan to use the Primitive Racing lift (lift kit and subframe spacer kit) unless someone says it is a poor choice. I like that Primitive provides progressive King Springs. Comments indicate the springs provide an improvement in ride and handling.