The BIKONE DCTech T47 Internal dub bottom bracket is designed for cyclists who demand the best in performance and durability, whether you´re tackling tough mountain trails or cruising on roads. Thanks to our Dual Cup (DC Tech) technology and our high-quality bearings, you´ll experience the smoothest ride.For Sram dub wide cranks, it is necessary to purchase a Dub Wide adapter kit. For correct compatibility, mountain cranks should always be mounted on mountain frames and road cranks on road frames.Features:- Dual Cup Technology. Two aluminum cups that perfectly align the bearings on both sides, creating a solid central joint that eliminates any noise or movement issues.- This bottom bracket uses Chronium steel bearings (ABEC5 / P5 – 2RS).- The cups of our bottom bracket axles are made of 6061 Aluminum, an aerospace-grade aluminum with high corrosion resistance on which we apply a T6 treatment. This makes the material harder and more durable, ensuring that our cups maintain maximum performance over time.- Fully sealed. Axial seals on the bearings and completely sealed on all surfaces.- Lighter. The number of pins on this bottom bracket has been reduced to make it lighter.Specifications:- Crankset diameter: 29 mm (Sram dub)- Frame width: 85.5 – 92 mm (Compatible with road and mountain bikes)- Frame diameter: T47- For threaded frames- This bottom bracket uses a normal T45/T47 for assembly and disassembly. Outer diameter of 52 mm and inner diameter of 48.2 mm. 16 notches.- Weight: 140 gramsThis bottom bracket is compatible with the following spare parts:- 6806 steel bearing- 6806 Bearing kit for Sram Dub- Adapters for PF46 / PF30 / T47 / EVO / BBright / T45 for Sram Dub