DuraTrax Tires On-Rd w/Foam Inserts Mini Quake (4) FEATURES: Perfect Blend of Natural and Synthetic Rubber Street Traction Tires are Great for Concrete Asphalt or Hard Packed Dirt Surfaces (directional tread design);INCLUDES: Four tires and 4 inserts;REQUIRES: Wheels - DTXC9868 CA glue - DTXR2000