The Shimano 105 FC-RS520 is a 2-piece, 4-arm crank that's compatible with modern disc brake road frames.

• 4-arm crankset for 12-speed drivetrain
• Compatible with frames of O.L.D. 135mm and 410mm chainstay length
• 44.5mm chainline
• 150mm Q-factor
• Compatible with HG 12-speed chains

Specifications:

• BB Included: No
• Chainline/Hub Compatibility: 135/142 Road Disc Hubs > 415 mm Chainstay
• Chainring BCD: 110 Shimano Asymmetric
• Color: Black
• Crank Intended Use: Road
• Crank Length (mm): 170
• Defined Color: Black
• Drivetrain Speeds: 12
• Number of Chainrings: Double
• Pedal Spindle: 9/16"
• Rings: 50/34
• Spindle Interface Type: Shimano Hollowtech II
• keyword search: 105