SRAM Red Crankset 11 sp. 172.5 52/36T BCD: 110mm GXP 68/70mm 45.5mm Carbon BB/Frame Interface-BB121 The spiral zipper design offers

The spiral zipper design offers an improved range of motion

Material:  hardened and electropolished 416 stainless steel

5 Stanchions Diameter 35mm Axle/Hub spacing 15x110mm TA e-Bike approved Yes

Reamer 1699

Large diameter ball-bearing pivot: An industry first

SRAM Red Crankset 11 sp. 172.5 52/36T BCD: 110mm GXP 68/70mm 45.5mm Carbon BB/Frame Interface-BB121 The spiral zipper design offersMaterial: Exogram hollow carbon fiber arms Chain Compatibility: 11 speed Pedal Spindle: 9 16 Bottom Bracket: Not included SRAM Model ID: FC RED C2 TECH SPECS Drivetrain Spacing Road Primary Color Black Crank Arm Length 172. 5mm Speed 11 Crank Spindle Diameter 24 22mm BB Inclusion No Crankset Material Carbon Interface GXP Teeth 36 52 BCD 110 Chainline 45. 5mm