Continental Men's Compact Tubes Bike Parts, Other, [50 507 >60 507]

Amazon

Available in all sizes, the standard inner tube offers the best compromises for the demands of everyday life Weight and rolling resistance can be significantly improved with Light and Supersonic inner tubes However, the thinner wall thickness of 0.45 mm increases the risk of a puncture. Light inner tubes must be inflated more often

Blacks

Continenal Compact Inner Tubes, Available options : Shrader, presta or woods Valve