Bike seatpost reducer shim extension convert tube adapter 27.2 25.4 30.9 31.6

Ø27.2 mm > Ø31.8 mm. Ø27.2 mm > Ø31.6mm. Ø27.2 mm > Ø31.4 mm. Ø27.2 mm > Ø31.2 mm. Ø27.2 mm > Ø30.9 mm. Ø27.2 mm > Ø30.8 mm. Ø27.2 mm > Ø30.6 mm. Ø27.2 mm > Ø30.4 mm.

This product would be ideal for cyclists upgrading their bike seats or downshifting to a smaller or lighter option.