Shimano Fc-rs520

Road crankset for 12-speed with 4-arm design This 2-piece crank uses an outboard, 24 mm bottom bracket and features 2x12 speed 50-34T chainrings. It uses a 4-arm construction and is compatible with modern disc brake road frames.Features:Affordable and high-end style crankset: - 4-arm crankset for 12-speed drivetrain- Compatible with frames of O.L.D. 135 mm and 410 mm chainstay length- 2-Piece CranksetSpecifications: - Threaded bottom bracket shell width (mm)_70: Yes- 2-PIECE CRANKSET: Yes- Chainring combination: 50-34T- Compatible bottom bracket type_Outboard: Yes- Crank fixing screw included: yes- Crank arm length (mm)_165: yes- Crank arm length (mm)_170: yes- Crank arm length (mm)_172.5: yes- Crank arm length (mm)_175: yes- Spider/Gear arms: 4- Optional chain guard_Without chain/bash guard: yes- Recommended bottom bracket_Press-fit: BB-RS500-PB- Recommended bottom bracket_Threaded (normal): BB-RS501- Threaded bottom bracket shell width (mm)_68: yes- Q-factor (mm): 150- Chain line (mm): 44.5- Compatible chain: HG 12-speed- P.C.D. (mm): 110- Rear speeds: 12Technology:2-piece crank set: - Integrated crank arm and bottom bracket: Increased rigidity with less weight- Wider bearing positioning: Rigidity is enhanced and pedaling force is efficiently transmitted- Precision Bearings: Low maintenance and simplified installation