BBB Bicycle Tube AV American Valve 40MM 762910 (BeeBeeBee) BTI-89 29X1.9/2.3

Outer diameter: 29". Size: (HE) 29 x 1.9/2.3. AV/40mm. BBB tubes use a specially blended synthetic butyl rubber, resulting in extremely low air leakage, superior durability, and long-term use. Install on a compatible rim and tire, and insert your finger...