Donnelly Sports AVL Tire - 29 x 2.4 Tubeless Folding BlackDonnelly Sports AVL Tire 29 x 2. 4 Tubeless Folding Black. The AVL is a trail inspired tire thats ready for variable conditions with a carefully designed tread to balance traction and speed. Blocked center tread provides traction for climbing and braking with directional ramped and stepped knobs to keep the tire rolling fast Wider spacing of the tread will help the tire clear debris from the trail Intermediate knobs provide a stable lay over before