Brand: FSA

Model: PowerBox | SMN 12

Teeth: 54T

BCD: 110mm | 4-Arm Asymmetrical (mounting bolts & covers NOT included)

Compatible: FSA PowerBox (including Aero models), SL-K ABS cranksets that have 110mm BCD Asymmetric Bolt Pattern. Optimized for use w/ Shimano 12 Speed drivetrains and the PowerBox power meter crank spider.

Weight: 174 grams (actual)