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Shimano Dura-Ace screw-on track cogs for fixed gear bikes. Standard 1.37" x 24 TPI threads.
Reviewed by 1 customer
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Comments about Shimano Dura-Ace Track Cog:
If you have been around track bikes and fixed gears for long, then you will be familiar with cogs coming loose and stripping hubs. The cog is one area that you do not want to cheap-out on. It could mean replacing your whole hub. Shimano has made a durable, light weight, cog that happens to look much better than the cheapies out there. I highly recommend this product combined with the Dura Ace lock ring.