The Bikone DCTech BB30 bottom bracket for Shimano cranks is designed to power through every mile you ride.It´s designed for cyclists who demand the best in performance and durability, whether you´re hitting rugged mountain trails or cruising down rough roads.Thanks to our Dual Cup (DC Tech) technology and high-quality steel bearings, you´ll experience the smoothest rides, no matter how rough the road gets.Mounting Specifications.Crankset diameter:24 mm.Frame width:68/73 mm (road and mountain bikes).Frame diameter:42 mm.For Pressfit frames.DCTech BB30 Features for Shimano.Dual Cup Technology.Two aluminum cups that perfectly align the bearings on both sides, creating a solid center seal that eliminates any noise or movement.This bottom bracket uses Chronium steel bearings (ABEC5 / P5 - 2RS).The cups of our bottom brackets are made of 6061 aluminum, an aerospace-grade aluminum with high corrosion resistance, which we apply a T6 treatment.This makes the material harder and more durable, ensuring our cups maintain peak performance over time.Fully sealed.Axial seals on the bearings and fully sealed on all surfaces.This bottom bracket is compatible with the following spare parts:Bearing steel 30407.Adapters for PF46 / PF30 / T47 / EVO / BBright / T45 for Shimano.Compatible bikes:Specialized Crux (2018-2021).Specialized Tarmac SL6 (2018-2022).Specialized Allez Sprint (2017-2021).Specialized Allez Sprint Comp 2018.Specialized Allez Sprint Comp Disc 2019.Specialized Allez DSW Sprint X1 2016.Specialized Allez Sprint Disc Frameset 2021.Specialized Venge ViAS 2016-2018.Cannondale CAAD10 2015.Cannondale CAADX 105 Disc 2015-2016.Cannondale Kekyll 7.5 2015.Cannondale Trigger 27.5 2015.Felt AR3 2015.Felt F FRD 2015.Felt IA FRD / IA 2015