SpeedTreads Breakaway SC Tire Mounted: SLHR, 4X4FR, ECXThis is a pair of Duratrax SpeedTreads Breakaway SC Mounted Tires for the Traxxas Slash 4x4, Rustler 4x4, and ECX 4x4 vehicles. Features: Fits the rear of the Traxxas Slash and Rustler and the front and rear of ECX 4x4 Vehicles For hard packed blue groove, wet loose dirt, pavement and grass surfaces Composite plastic beadlock look wheels Specs: Hex Size: 12mm Mounting Bead: 2. 2" (56mm) Outer x 3. 0" (76mm) Inner Includes: Two Duratrax SpeedTreads