Shimano SF-1200 Freewheel - 20t Bronze MFPN=71617 Each tube is usually adequate

Each tube is usually adequate for gluing two tubular tires

Ergonomic design for a more intuitive snapping on and off TWIST base

The Black Jack provides a versatile tread with good grip and easy rolling

Designed for Trail Enduro and XC riders and racers the Fatbar Lite Carbon is the product of an intense and in-depth research and development program

Expander bolt is externally and internally threaded to set expander and accept standard stem preload bolt and top cap (available separately)

Shimano SF-1200 Freewheel - 20t Bronze MFPN=71617 Each tube is usually adequateShimano SF 1200 Freewheels1 2" x 1 8" Chain compatible Cassette Body Type Threaded Standard 1. 37" x 24tpi Teeth Count 20T