Made of top-quality butyl rubber, theBicycle Tube Kellys 12 1/2 x 2-1/4 (57-203) AV 40mm 45offers long-term air stability and excellent puncture resistance. The AV (40mm) valve is bent at 45 degrees to make inflation easier.Technical description:Long-term air stabilityExcellent puncture resistance40mm AV valve bent at 45Material:butyl rubber
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