The Shimano FC-RX820 crank balances weight savings, optimized efficiency and an array of gearing options that cater to the segmented demands of mixed-terrain riding.

• Riders can choose closer gear steps or ultimate range depending on personal need by pairing a 10-45t or 10-51t cassette with 40t or 42t chainring (cassettes and 42t chainring sold separately)
• Optimal gearing for mixed-terrain riding
• Hollowtech II crank arms provide strength and stiffness with the benefit of weight savings
• Compatible with HG 12-speed chains
• 49.7mm chainline
• 151mm Q-factor
• Number of Chainrings: Single
• Color: Black
• Chainline/Hub Compatibility: 135/142 Road Disc Hubs > 415 mm Chainstay
• Pedal Spindle: 9/16"
• Crank Intended Use: Gravel
• Crank Length (mm): 172.5
• Rings: 40
• Spindle Interface Type: Shimano Hollowtech II
• Drivetrain Speeds: 12
• Defined Color: Black
• Chainring BCD: 110 Shimano Asymmetric
• BB Included: No
• Weight: 644