Master ISO Bolt-On Track Cog Adapter Now Available!

The legendary Master Bike Co. 64 driver hub is officially the most versatile hub on the market. Not only can it be converted to freewheel or swapped out with a 3/8th axle, you can now add their new ISO track cog adapter to run standard fixed gear cogs! Grab one here to upgrade your whip. Here’s what Master says about them:

“This driver attachment works with the Master 64 hubs to allow for the use of ISO 6 bolt track cogs. These drivers are compatible with our 14mm or 3/8 axles.  Hubs and cogs sold separately.”

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