Features 1、Hollow Integrated Design: Featuring an hollow integrated construction, this mountain cycling crankset significantly reduces weight, enhancing overall riding efficiency, you can use it with confidence 2、For 8-12 Speed System: Suitable for 8-12 speed gear system, this 34T riding crankset ensures smooth and seamless gear transitions, upgrading your cycling experience and riding security 3、Positive Negative Tooth: Incorporating a unique positive and negative tooth design, this chainring crank set boosts sprocket stability, minimizing the risks of chain drops during rides 4、34T Crankset: Designed with 34 tooth, this crankset is suitable for mountain cycling, providing ample torsion for tackling steep hills and swift acceleration, offering a smoother riding experience 5、Versatility: Including the chainring, crank, and bottom bracket, this crankset adapts to both road and mountain cycling, allowing for flexible matching and customization to suit your riding needs Item Type: 34T Crankset Material: Aluminum Alloy Specification: Positive Negative Tooth, BCD104MM Number of Tooth: 34T Axle Diameter: Approx. 29mm / 1.14in Compatibility: 8-12 Speed Bottom Bracket: BB68 Threaded Bottom Bracket Package List 1 x Chainring 1 x Crank 1 x Bottom Bracket 1 x Accessory