Sunrace external threaded bottom bracket designed for 24 mm crank axles, specifically compatible with Shimano HollowTech II systems. Built with alloy cups, composite spacers, and sealed cartridge bearings, it offers smooth, low-friction performance across MTB, gravel, city, and e-bike platforms. With a 68/73 mm BSA shell fit and silver anodized finish, it’s a dependable upgrade for advanced riders seeking durability and precision.
Features
Durable alloy and composite construction
Compatible with Shimano Hollowtech II
Smooth, sealed bearing performance for varied terrain
Technical Specifications
Material: Alloy cups, composite sleeve and spacers
Fitting: BSA
Use: Gravel, City, E-Bike,MTB,