This BOLANY MTB HollowTech Crank is a high-quality product suitable for multiple types of bikes, including hybrid, dirt jumper, and mountain bikes. The crankset is made of aluminum and aluminum alloy material, ensuring durability and long-lasting use. It comes with a 34T CNC chainring, bottom bracket, and integrated crankset. The BCD of the crankset is 104mm, and it has a crankarm length of 104mm, with a choice of lengths of 170mm or 175mm. This product is compatible with 9/10/11/12-speed Shimano bikes, and it comes with a 1-year manufacturer warranty. This MTB crankset is a great addition to any bike and provides excellent value for money.