i'm planning on ordering a set of aftermarket C6 rims 18x9.5 w/ 50mm offset and wondering what size tires to run either Kumho Ecsta MX's 275/40/18 or 275/35/18.

i want to go with the 40 series just to have a bit more cushion but i'm not sure if they will rub.i'm going to run these rims with 2 in. spacers in the front and probably 1.75 or 2 in the rear.

any one running something similar or have any suggetions?

 

275/35/18 would be the tire to get if you wanna get close to the OEM tire height. If the car wasn't dropped alot then the 275/40/18 would work but it would be taller than stock.

 

thanks i'll be going with the 35 series just to be on the safe side but are two inch spacers reccomended all the way around?

i don't want my tire to rub and it doesn't at all right now with the 18x8 in. Irocs with 245/40/18 i did some math with the skulte formula...(17x9.5", 50mm Offset)

9.5" / 2 + 50mm / 25.4 Offset + 0.25" Lip = 6.97" Backspacing

Rim Backspacing - Max Backspacing = Adapter Thickness

6.97" - 5" = 1.97" Front Adapter Necessary
6.97" - 5.85" = 1.12" Rear Adapter Necessary