TryOn 特恩 - SRAM Omnium Crankset srp 15k / set The purists' choice for street and track performance. The Omnium track crankset is the first external bearing track crank in the world.
Sram Omnium | rk211b | Flickr
SRAM Omnium Track Crankset with GXP Bottom Bracket
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How to install Sram Omnium Track Crankset - YouTube