50 teeth, 1-speed, DUB, power meter, without bottom bracket, black 12-speed compatible, carbon crank arms, X-Sync Aero aluminium chainring for direct mounting, Bluetooth and ANT+ wireless technology, LED indicator light for readiness, reset and low battery, accuracy: +/- 1.5%, dual-sided measurement, tool-free battery change (CR2032), chainline 45 mm Number of chainrings 1 Type Main colour black Large chainring 50 T. Chainline 45.0 mm Crank length 172.50 mm System compatibility 12-speed Bottom bracket DUB Variation Chainset