Shimano FC-RX810-1, GRX Hollowtech 2, 172.5mm, 40T Front Chainwheel

• GRX 11 speed, hollow arm 1X crankset
• Narrow-wide 40T chainring
• Balances weight and efficiency for mixed-terrain riding
• Gravel specific gearing ratios with 1X simplicity and wide-range gearing
• Bottom Bracket : Not included - SM-BBR60 / SM-BB72
• Chainline: 50.1mm
• Weight : 644g