Material: 7005 aluminum alloy (crank)+7075 aluminum alloy (disc/shaft center)

Color: black/silver

Compatible: 8-12speed

Crank length: 165mm (about 498g)/170mm (about 517g)/175mm (about 529g)

Gear ratio: 50-34T(about 180g)/52-36T(about 169g)/53-39T(about 169g)

Bottom support: BSA (68-73mm) about 100g

Q factor: 148mm

Advantages: The crank adopts full CNC process and LOGO carving process, which reduces the weight and improves the strength

Features: High performance power transmission light weight dental disc