Hey fellow X coupe owners. What are the best tire size to run squared for 18x9.5? Looking to not mess with my awd. Im also on stance coilovers and have about 1 finger gap front and rear about 1.5 finger gap.

 

I would go with 245/45/18 all around.

 

Thats the size in running now on factory 8
18x8

 

Depends on your offset, you can safely run up to a 285 on a 9.5" width.

 

Looking at wheels that are 18x9.5 +34 or 18x9.5 +25

 

0n the +34s I'd run a 275/40/18, on the +25s a 255/45/18 would be the size I'd go with.

 

A 275 up front might be too big.

 

255/45/18 sounds like a good fit, gives you a bit more grip over the 245s but can still give you lots of room at the fender.

 

It would be essentially the same fit at the fender as staffer Lt8che's X coupe running 18x9.5 +30 on 265/40/18 here~ https://www.myg37.com/forums/brakes-...ml#post3815735 A 255/45 or 265/40 will give you a some wiggle room and there is a higher chance to introduce some tramlining as you go to the wider 275 tires. Depends how aggressive a look you're after. Running the 255s on the +25 offset will also net the same fit at the fender as Lt8ches, so you've got some good options Also a 255 is typically much easier to find than 265 width tires.

 

Will 255/45/18 squared give my awd issues?

 

They're about .34" taller than the standard 245/45, your speedometer will be 1.3% off but since you have no variance front to rear, your AWD system won't have any issues. Lt8che runs that 265/40 which is also about the same difference (only .34" shorter rather than taller) without issue.