Birzman Chain Keeper - black/silver

A Chain Keeper (dummy hub) compatible with both QR and 12 mm thru-axle dropouts without switching of parts or adapters.

Featuring a free-spinning and side-shifting pulley wheel, allowing shifting of the derailleur and a high polymer spacer providing abrasion protection against dropout surfaces, this is a quick and easy tool to have on hand for routine cleaning and maintenance work. 

Details of the Birzman Chain Keeper

• Pulley wheel is compatible with single -13 speed chains.

• Compatible with both QR and 12 mm thru-axle dropouts without switching of parts.
• Features a free-spinning and side-shifting pulley wheel, allowing shifting of the derailleur.
• High polymer spacer provides abrasion protection against dropout surfaces.
• Material: CNC machined aluminium / Alloy steel / High polymer
• Size: 140 x 110 x 50 mm