SHIMANO GRX FC-RX610-1 Crankset

The FC-RX610-1 crankset balances weight reduction, efficiency, and gear options for mixed terrain riding. Pairing 10-45T or 10-51T cassettes with 38T or 40T chainrings allows riders to choose tighter gear steps or wider range based on personal preference. Available in 165, 170, 172.5, and 175 mm crank arm lengths for greater customization.

Key Features

• Optimized gear ratios for mixed terrain
• Supports 10-45T and 10-51T cassette options
• Available with 38T and 40T chainrings
• HOLLOWTECH II technology
• No chain guard or impact protection cover

Specifications

• Model No.: FC-RX610-1
• Series: GRX
• Rear Speeds: 12-speed
• Compatible Chain: HG 12-speed
• Chain Line: 49.7 mm
• P.C.D.: 110 mm
• Crank Arm/Spider: 4-arm
• Chainring Options: 38T, 40T
• Q-factor: 151 mm
• Crank Arm Lengths: 165 / 170 / 172.5 / 175 mm
• Compatible Bottom Bracket Type: Outboard
• Recommended BB: BB-RS501 (threaded), BB-RS500-PB (press-fit)
• BB Shell Width: 68 mm, 70 mm
• Includes Crank Fixing Bolt: ✔
• Average Weight: 791g (38T), 812g (40T)
• Color: Series color