• GRX 11 speed, hollow arm double crankset
• 31-48T: Shimano's widest range gravel-oriented double crank, provides optimum gearing and maximum efficiency for mixed terrain riding
• Tighter gear steps than 1X drivetrains make it easier to maintain pedaling rhythm
• Bottom Bracket : Not included - SM-BBR60 / SM-BB72
• Chainline : 46.9mm
• Weight: 710g