Wheels Manufacturing Freewheel and Bottom Bracket Cup Shims 1.0mm Bag/10

Wheels Manufacturing Freewheel and Bottom Bracket Cup Shims 1.0mm Bag/10. Spacers for fine tuning freewheel and cassette placement or adjusting chainline on frames with B.S.A external type bottom bracket cups.

Fits between frame and drive-side cup (cup must have lip) to adjust chainline or crank clearance