描述

XTR 級鎖牙式五通，登山車專用密封設計。
SHIMANO XTR SM-BB93 屬頂級 XTR 系列，採用小型滾珠軸承，重量僅約 73g。專為登山車開發的密封結構，有效阻隔泥沙與水份，同時提供順暢輕盈的旋轉表現，適合 Cross Country、All Mountain 及 Enduro 騎乘。

為何選擇 SM-BB93？

• XTR 頂級系列：比前代 SM-BB90-A 輕 19.3g，踩踏更輕盈

• 小型滾珠軸承：降低重量同時保持順暢旋轉

• MTB 專用密封：針對登山車嚴苛環境開發，耐用性更高

• 陽極氧化軸承杯：鋁合金材質，兼顧剛性與輕量

• BSA 鎖牙設計：穩固安裝，兼容 68mm / 73mm 五通殼寬度

適合哪些騎乘？

登山車、Cross Country、All Mountain、Enduro。

技術規格

兼容性

• 曲柄：SHIMANO XTR Hollowtech II 24mm 軸心曲柄，包括：

  • FC-M980、FC-M985

  • FC-M9000、FC-M9020

  • FC-M9100、FC-M9120、FC-M9125、FC-M9130

  • FC-MT900

• 車架：BSA 鎖牙式五通殼（直徑 34.8mm），寬度 68mm 或 73mm

• 安裝工具：TL-FC32（軸承杯工具）；TL-FC24（軸承杯適配器）

包裝內容

• 1 x SM-BB93 右側軸承杯（含軸承）

• 1 x SM-BB93 左側軸承杯（含軸承）

• 1 x 五通中心管（Inner Sleeve）

• 3 x 墊片（Spacer）

備註

• 安裝時請依五通殼寬度選用墊片：68mm 需使用墊片，73mm 視情況調整。

• 此為 BSA 鎖牙式五通，不適用於壓入式（Press-Fit）車架。

• 安裝需使用專用工具，建議由合資格技師安裝。

SHIMANO XTR BOTTOM BRACKET SM-BB93

XTR-Grade Threaded Bottom Bracket with MTB-Specific Sealing.
The SHIMANO XTR SM-BB93 belongs to the top-tier XTR series, featuring small ball bearings and weighing only approximately 73g. The MTB-specific sealing effectively blocks out mud and water while delivering smooth, light rotation, ideal for Cross Country, All Mountain and Enduro riding.

Why SM-BB93?

• XTR Top-Tier Series: 19.3g lighter than predecessor SM-BB90-A for lighter pedalling

• Small Ball Bearings: Reduced weight while maintaining smooth rotation

• MTB-Specific Sealing: Developed for harsh mountain bike conditions, enhanced durability

• Anodised Bearing Cups: Aluminium construction balancing stiffness and lightweight

• BSA Threaded Design: Secure installation, compatible with 68mm / 73mm shell widths

Ideal For

Mountain biking, Cross Country, All Mountain, Enduro.

Technical Specifications

Compatibility

• Cranks: SHIMANO XTR Hollowtech II 24mm axle cranks, including:

  • FC-M980, FC-M985

  • FC-M9000, FC-M9020

  • FC-M9100, FC-M9120, FC-M9125, FC-M9130

  • FC-MT900

• Frames: BSA threaded shells (34.8mm diameter), 68mm or 73mm width

• Installation Tools: TL-FC32 (bearing cup tool); TL-FC24 (bearing cup adapter)

Package Contents

• 1 x SM-BB93 Right Bearing Cup (with bearings)

• 1 x SM-BB93 Left Bearing Cup (with bearings)

• 1 x Bottom Bracket Center Tube (Inner Sleeve)

• 3 x Spacers

Notes

• Select spacers according to shell width during installation: spacers required for 68mm, adjusted as needed for 73mm.

• This is a BSA threaded bottom bracket, not suitable for Press-Fit frames.

• Professional installation recommended; requires specific tools.