The DS Racing Mini-Z 11mm Wide Rear Wheels are designed to give you a performance driven tire for optimal drifting. The narrow rear tires are designed to mount to 22mm wheels (sold separately). Available in multiple compounds to best suit your driving surface. Compound Chart: MI-LF5: The most slippery on every surface MI-LF4: Slippery on carpet MI-LF3: Slow speed for hard surface / Medium speed on carpet MI-LF1: Medium speed for hard surface MI-F5: Terrazzo and Marble surface