【Aluminum alloy one-piece forging】The high-strength 6061-T6 aluminum alloy is used for one-piece forging processing. 【Professional Design】Ergonomic structure,Super lightweight and incredibly strong.Best choice for riders who want more control on their bicycles. 【Axle chromium molybdenum steel】for your riding comfort, reduce fatigue, the steel shaft has high strength, good toughness, high temperature resistance, corrosion resistance, light weight, impact resistance. 【Chainring】Chainring adopts 7075-T6 heat treatment, full CNC cutting process, lighter weight, more beautiful and atmospheric, with 32T/34T/36T/38T 3mm/6mm gear ratios to choose from to correspond to different riding environments 【Easy Installation and compatibility.】 Compatible with most mountain bikes and dirt bicycles.Including not confined to Shimano, SRAM XX1 XO1 X1 GX XO X9.