The GBC X-Rex provides excellent traction for a cross-country terrain tire. The X-REX is built on a tough 6-ply rated carcass, providing maximum puncture resistance and perfect for endurance and cross-country racing. The X-REX is available in both front and rear tread designs.

The Race Rex, GBC's newest sport ATV tire, comes in a 21-7-10 front and 20-11-9 rear.