Sunrace External Shimano Bottom Bracket MTB

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,