These are Suburbs MC (Clay) Off-Road 1:8 Buggy Tires. The wait is over. The ROAR National Champion Suburbs tread is now available for 1:8 buggy owners. Introducing the Suburbs in Pro-Line`s proprietary M3 (Soft) and MC (Clay) compounds. It only makes sence that the ever popular indoor and blue groove tread pattern would be made available to the 1:8th class.