Crank description: Crank length: 170MM Brand: JIANKUN (IXF) Crank Arm length: 170mm Material: AL6061 aluminum alloy Compatible: Single/Double/Triple chainring; for 7/8/9/10/11/12S chainring Bolt Center Diameter: 104mm BCD Weight: about 637g (right & left) Advantages: light weight,stylish appearance,very cool,high strength axle,strong compatibility Chainring description: Teeth: 24/32/42T Speed: 3x10S Material: Steel Bolt Center Diameter: 104/64mm Weight about: 24t-47.8g/32t-79.6g/42t-162.7g Chain line: 50mm Axle: BB24 Forged CrMo Advantages:special teeth profiles design is lead to the chain leave the chainring easier when variable speed happened.Secondly,because of the concave and convex design,the chain has an excessive place ,so the riding speed can be smoother Bottom Bracket descriptio.
