This is a pair of Shotgun Short Course C3 Compound Tires from DuraTrax. FEATURES: Small spikes in groups of four ideal for loose (dry and loamy), hard packed (dry), blue groove (fast) and indoor clay (damp) track surfaces Tires molded from soft C3 compound Color-coded sidewall markings make it easy to identify each tread pattern at a glance INCLUDES: Two Shotgun SC Tires with Foam Inserts REQUIRES: Short Course Wheels Tire Glue DTXR2000, DTXR2002 SPECS: Width: 1.74" (41mm) Outer Diameter: 4.25" (108mm) Mounting Bead: 2.2" (56mm) Outer x 3.0" (76mm) Inner jxs 06/23/11 ir/jxs