50 teeth, 1x, DUB, without bottom bracket, 12-speed compatible, hollow carbon crank arms, X-Sync Aero direct mount aluminum chainring, Bluetooth and ANT+ wireless technology, LED indicator for operational readiness, reset and low battery, accuracy: +/- 1.5%, dual-sided measurement, tool-free battery replacement (CR2032), chainline 45 mm Number of chainrings 1 Type Item Main color black Large chainring 50 T. Chainline 45.0 mm Crank length 170.00 mm Secondary color grey System compatibility 12-speed Bottom bracket DUB Variation Crankset The new and refined construction of the 1x RED Aero crankset has resulted in a very low weight and high stiffness. It is a remarkable 29 grams lighter than its predecessor. The highly accurate integrated power meter has also become lighter with a new carbon crank arm construction. It is very accurate to +/- 1.5% deviation and is not affected by temperature fluctuations. Single chainring drivetrain simplifies functionality and reduces weight Power meter is fully integrated into the chainring for lower weight and greater accuracy Highly accurate power measurement to +/- 1.5% deviation Direct mount aero chainrings Optimal chain control through X-range chainring Ultralight hollow carbon cranks DUB bottom bracket Sram Article number: 735222 EAN code: 710845899072 Supplier number: 00.6118.686.003 Retail packaging: Yes