These cranks have been removed from a new bike that was never ridden. Sram Omnium 172.5 crankset with 144 bolt pattern. Included is a new take off bottom bracket Sram GXP English thread and a new truvative 48T 1/2x 1/8 chainring. Ready for your track frame or fixie bike. Great length for pursuit or timed events on track. Not too common. These are new bike take offs. No disappointments here. Lower 48 continental USA sale only. Clean unused equipment.