SRAM Force 1x Aero Powermeter E1 Power Meter Crankset Speed: 12/13 Spindle: 28.99mm BCD: Direct Mount SRAM 8 Bolt 50 DUB 175mm Black RoadMeasure your ride power data more accurately than ever with the Force 1 AXS power meter. Its the lightest and stiffest integrated Force power meter yet. Accurate to + 1. 5% and unaffected by temperature changes Power meter is fully integrated into TECH SPECS BCD Direct Mount SRAM 8 Bolt BB Inclusion No Chainline 45mm Teeth 50 Connectivity ANT+ BT LE Crank Spindle Diameter 28. 99mm Crank Arm Length 175mm Interface DUB Crankset Material Carbon Pedals