SRAM RED Crank Arm Assembly - 172.5mm 12-Speed 8-Bolt Direct Mount DUB Spindle Interface Natural Carbon E1 Model-Paceline X Drawing from the premium 110-Series

Drawing from the premium 110-Series design the 40-Series includes all the features necessary for a durable lightweight long-lasting headset

An integrated carbon chassis and full carbon cuff deliver an ultralight feel and responsive power to every stride

To determine if your spider is removable

The perfect solution for marathon racers and trail and enduro riders that are looking for a lightweight resistant and compact spare tube

SRAM RED Crank Arm Assembly - 172.5mm 12-Speed 8-Bolt Direct Mount DUB Spindle Interface Natural Carbon E1 Model-Paceline X Drawing from the premium 110-SeriesSRAMs lightest and stiffest crank arms Compatible with 8 bolt spiders, chainrings, and powermeters SRAM Model ID: FC RED ASSY E1 TECH SPECS BCD Direct Mount SRAM 8 Bolt Crank Arm Length 172. 5mm