The SD-X Sniper cog is CNC machined from stainless steel for BMX race, and it is compatible with SD Sniper hubs only. It fits onto hub bodies carrying the Shimano imprint.
Stainless steel stands up to the friction the chain puts through a single cog, and the contact surface is enlarged to avoid signs of wear on the hub. An asymmetrical shoulder sets the cog where it needs to sit for proper chain alignment, and it runs the 1/2 x 3/32" chain that is standard for BMX race.
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