303- Touring car wheels have a standard offset, and all the cars are designed with that standard in place. 1/12 scale has no standard offset. A SpeedMerchant will still be too wide with BSR/CRC wheels without narrowing the tire. That effectively prevents anyone running that car from racing unless they cut the wheel down, which isn't the most precise task to do on a race day. My sponsorhip to a tire company has nothing to do with my statements. Until there is a manufacturer-wide standard concerning wheel offset, spec-ing just the foams is the only viable option