描述

ROTOR PF4124 是 ROTOR 通用五通（UBB）概念的产物，专为解决压入式五通与曲柄之间的兼容性难题而设计。适用于 41mm 直径的压入式五通壳，支持 BB86、BB89 及 BB92 规格，兼容 ROTOR 及 Shimano 24mm 轴心曲柄 。

为何选择 PF4124？

• Universal BB 概念：ROTOR 原厂设计，消除五通与曲柄的兼容性困扰

• 非接触式迷宫密封：极顺畅旋转的同时，提供防尘、防水、防泥沙的优异保护 

• 7075-T6 铝合金轴承杯：100% CNC 加工，阳极氧化处理，兼顾刚性与耐用 

• 高刚性塑料盖设计：显著提升抗侧向压缩及抗变形能力，变速更精准 

• 适配广泛车架：兼容 BB86、BB89、BB92 标准，常见于 Giant、Scott、Canyon、BMC 等品牌车架 

• 西班牙制造：ROTOR 原厂工艺

适合哪些骑乘？

公路、铁人三项、越野公路、砾石、登山车 。

技术规格

兼容性

• 曲柄：ROTOR 24mm 轴心曲柄（3D24、REX 3、Aldhu 24、Vegast 24 等）、Shimano Hollowtech II（Dura-Ace、Ultegra、105 等）、FSA MegaExo、Race Face X-Type 等 24mm 轴心曲柄 

• 车架：BB86（86.5mm）/ BB89（89.5mm）/ BB92（92mm）压入式五通壳，直径 41mm 

• 不兼容：BSA 螺纹式车架；非 24mm 轴心曲柄

包装内容

• 1 x PF4124 右侧轴承杯（含轴承）

• 1 x PF4124 左侧轴承杯（含轴承）

• 1 x 2.5mm 垫片（视版本而定）

备注

• 此為压入式五通，不適用於 BSA 螺纹式或 T47 车架。

• 安装需使用专用压入工具，建议由合资格技师安装。

• 购买前请确认车架五通壳直径（41mm）及宽度。

ROTOR PF4124 Bottom Bracket (Press-Fit for BB86/BB89/BB92)

The “yes” answer for BB86 frames with 24mm axle cranks.
The ROTOR PF4124 is the product of ROTOR’s Universal Bottom Bracket (UBB) concept, designed to eliminate compatibility challenges between press-fit bottom brackets and cranks. It fits 41mm press-fit shells and supports BB86, BB89 and BB92 standards, compatible with ROTOR and Shimano 24mm axle cranks .

Why PF4124?

• Universal BB Concept: ROTOR’s original design eliminating bottom bracket/crank compatibility frustrations

• Non-Contact Labyrinth Seals: Buttery-smooth rotation with superior protection against dust, water and mud 

• 7075-T6 Aluminium Cups: 100% CNC-machined, anodised, balancing stiffness and durability 

• Ultra-Rigid Plastic Cover Design: Significantly enhanced compression and deformation resistance for crisp shifting 

• Broad Frame Compatibility: Works with BB86, BB89 and BB92 standards, commonly found on Giant, Scott, Canyon, BMC and many other bikes 

• Made in Spain: Authentic ROTOR craftsmanship

Ideal For

Road, triathlon, cyclocross, gravel, MTB .

Technical Specifications

Compatibility

• Cranks: ROTOR 24mm axle cranks (3D24, REX 3, Aldhu 24, Vegast 24, etc.), Shimano Hollowtech II (Dura-Ace, Ultegra, 105, etc.), FSA MegaExo, Race Face X-Type and other 24mm axle cranks 

• Frames: BB86 (86.5mm) / BB89 (89.5mm) / BB92 (92mm) press-fit shells, 41mm diameter 

• Not compatible: BSA threaded frames; non-24mm axle cranks

Package Contents

• 1 x PF4124 Right Bearing Cup (with bearings)

• 1 x PF4124 Left Bearing Cup (with bearings)

• 1 x 2.5mm Spacer (depending on version)