The SM-BB93 is the most suitable Shimano bottom bracket if you want to mount XTR Hollowtech II 24 mm cranks of different generations from FC-M980 to FC-M9100 on a frame with BSA bottom bracket and 68 mm or 73 mm case width. The bottom bracket has special seals that were developed for MTB use. It also impresses with smooth running and low weight.

Specifications:

Application: Cross Country, All Mountain, Enduro

Series: XTR

Type: BSA

Shell Width: 68 mm / 73 mm

Axle Diameter: 24 mm (Hollowtech II)

Technical Information:

Bearings: Steel

Bottom Bracket Cup Material: Aluminium

Bottom Bracket Centre Tube Material: Aluminium

Compatibility:

Recommended for:

• XTR FC-M980, FC-M985, FC-M9000, FC-M9020, FC-M9100, FC-M9120, FC-M9125, FC-M9130
• FC-MT900

Features:

• 19.3 g lighter than predecessor SM-BB90-A
• Small ball bearings for low weight
• Smooth rotation
• Improved seal for long durability: specially developed for MTB use
• Anodized bearing cups and sleeves

Technology:

Hollowtech II – Shimano Hollowtech II is a crank bottom bracket system designed to achieve an ideal ratio of stiffness, weight and rotational efficiency. It is based on an integration of the bottom bracket and the right crank arm and works with a 24 mm axle or bearing diameter, which has proven to be optimal in terms of stability. In many cases, the bearing cups are on the outside so that the load is better distributed. High-quality precision seals ensure a long service life.

Contents:

• 1 x Shimano SM-BB93 right bearing cup, with bearings
• 1 x Shimano SM-BB93 left bearing cup, with bearings
• 1 x Shimano bottom bracket sleeve
• 3 x spacer