Road Bike Crankset 9/10/11/12 Speed CNC 170mm Hollow Bicycle Crank 40/42/44/46T Single Chainring Bottom Bracket For  Gravel

Model:GRS-RK2

Material:6061 aluminium alloy (cranks) and 7075 aluminium alloy (spindle)

Weight:598g (with 40T Chainring)

Color: matte black

Compatible with all 10-13s chains

Crank length: 170mm

Chainring: 40/42/44/46T

Bottom bracket:BB51(68-73mm)

Axle: 24mm

K-factor：91.5mm

Q-factor：148mm