15T

The ACS PAWS M30 Freewheel at J&R Bicycles were built to last with cold-forged high-grade steel and precision CNC'd to keep you at top performa...

The Box Hex Lab 3/32in Titanium Cog will raise your weight game by lowering your weight with Shimano-compatible cassette hubs and CNC'd from tough ...

The Box One 3/32in CNC Alloy 7075 Cog-Gold at J&R Bicycles is made from high-strength aircraft-grade 7075 aluminum alloy making it lightweight ...

The Excess EFW-S Freewheel at J&R Bicycles is designed to deliver responsive and efficient power transfer with the use of high-end alloy and te...

The Shimano Compatible Cassette Cog at J&R Bicycles is a durable quality cog splined for Shimano HG freehub capability and made from tough chro...

The Tangent Alloy Cassette Cog comes in all the sizes you need to fine tune your ratio. From 13T up to 19T and made from 7075 aircraft alloy and co...