Velobike Elite Narrow Track Sprocket - 11/128" Size:12T the rubber valve base ensures

the rubber valve base ensures a perfect air-tightness simply tightening the valve on the rim (with its nut)

these will be available until sold through

the efficiency gap doubles every 250w

Easy-to-grasp design

It can be hung on the back of a chair

Velobike Elite Narrow Track Sprocket - 11/128" Size:12T the rubber valve base ensuresA medium high end track cog made from hardened stainless steel. Precision CNC machined for accurate roundness and tolerances. Corrosion resistant and no coatings to wear off over time for greatest durability. A great performing and long lasting sprocket at an affordable price. Pair this with a Dura Ace HG901 waxed chain for the ultimate in drivetrain efficiency. FEATURES The latest Generation 2 design features increased hardness, and strength with a