650B

Serfas' Drifter is a great tire for cruising down the bike path and rolling down city streets. The tough 69 durometer rubber maximizes mileage while the inverted tread reduces rolling resistance for efficiency on the road. Plus, Serfas' Flat-Protection System lets you ride worry-free.

Gravel Muncher Tire 650X42 Folding Gravel - Fps Pro - Dual Density Silica Compound - Aggressive High Performance Tread Pattern Perfect For Tearing Up Gravel And Leaving Your Competition Literally In The Dust - Bead: Folding - Tpi: 120 - Dimension: 650 X 42 - Pressure: 85 Psi - Color: Black - 650X42 Folding