Double

Use: gravel, cyclocross, touring / trekking Series: GRX RX600 Speed:1x11-Speed Material crank arms: aluminum Chainring material: aluminum Material axle: steel Gradation: 40 teeth Crank arm length: 165mm Chain line: 50.1 mm Q factor: 151 mm Axle diameter: 24 mm Compatible housing width (with BSA bottom bracket): 68 mm Weight:Approx 170-40T (743g) (without bottom bracket) Bottom bracket (recommended): BB-RS500 or BB-RS500-PB Pressfit Hollowtech II (must be ordered separately) Chain (recommended): HG-EV 11-speed, HG-X11 (e.g. CN-HG601-11) Chainring attachment: 110 mm bolt circle diameter, 4-arm asymmetrical Compatibility: Shimano 1x11-speed.