描述

T47 寬五通殼的內置軸承方案，專為 30mm 軸心曲柄而設。
ROTOR T4730 內置式五通專為 T47 螺紋式五通殼設計，軸承置於車架五通殼內側，對應 85.5mm 至 92mm 的寬五通殼，以及專為 PF30/BB30 規格設計的短軸心曲柄。解決壓入式系統的異響與兼容性問題，同時保留螺紋式安裝的穩固與便利。

為何選擇 T4730 內置式？

• T47 內置設計：軸承位於五通殼內側，專為寬五通殼 T47 車架優化，安裝精準穩固

• 7075 鋁合金軸承杯：100% CNC 加工，確保軸承精準對位，延長使用壽命並減少摩擦

• 30mm 軸心專用：適配 ROTOR 3D+、Aldhu 30、Vegast 30、INpower、2INpower 等 30mm 軸心曲柄

• 矽膠密封：有效阻隔塵土與水份，提升耐用性

• 西班牙製造：ROTOR 原廠工藝

適合哪些騎乘？

公路、鐵人三項、越野公路、礫石、登山車。

技術規格

內置 vs 外置：如何選擇？

兼容性

• 曲柄：ROTOR 3D+、REX 30mm、Kapic、Aldhu 30、Vegast 30、INpower、2INpower 等 30mm 軸心曲柄

• 車架：T47 螺紋式五通殼，寬度 85.5mm / 86.5mm（部分版本支援 89.5mm / 92mm）

• 注意：若曲柄為專為 PF30/BB30 設計的短軸心規格（曲柄上通常刻有 PF30 或 BB30），則必須選用內置版本

備註

• 此為內置式版本，軸承位於車架五通殼內側；另有外置版本對應 68mm / 73mm 寬五通殼。

• 安裝需使用 ROTOR UBB+ BSA30 或 Park Tool BBT-47-12 專用工具，建議由合資格技師安裝。

• 購買前請確認車架五通殼寬度及曲柄軸心規格。

ROTOR T4730 Bottom Bracket (Internal)

The internal-bearing solution for wide T47 shells and 30mm axle cranks.
The ROTOR T4730 Internal BB is designed for T47 threaded shells, with bearings positioned inboard of the frame shell. It suits wide T47 shells from 85.5mm to 92mm and short-spindle cranks designed for PF30/BB30 standards. It eliminates the creaking and compatibility issues of press-fit systems while retaining the security and convenience of threaded installation.

Why T4730 Internal?

• T47-Specific Internal Design: Bearings inboard of the shell for precise, secure fitment on wide-shell T47 frames

• 7075 Aluminium Cups: 100% CNC-machined for precise bearing alignment, extended life and reduced friction

• 30mm Axle Specific: Compatible with ROTOR 3D+, Aldhu 30, Vegast 30, INpower, 2INpower and other 30mm axle cranks

• Silicone Seals: Effective protection against dust and water

• Made in Spain: Authentic ROTOR craftsmanship

Ideal For

Road, triathlon, cyclocross, gravel, MTB.

Technical Specifications

Internal vs External: Which to Choose?

Compatibility

• Cranks: ROTOR 3D+, REX 30mm, Kapic, Aldhu 30, Vegast 30, INpower, 2INpower and other 30mm axle cranks

• Frames: T47 threaded shells, 85.5mm / 86.5mm width (some versions support 89.5mm / 92mm)

• Note: If your crank is a short-spindle specification designed for PF30/BB30 (usually stamped PF30 or BB30), the Internal version is required

Notes

• This is the Internal version with bearings inboard of the frame shell; an External version is available for 68mm / 73mm shells.

• Installation requires ROTOR UBB+ BSA30 or Park Tool BBT-47-12 tool; professional installation recommended.

• Please verify shell width and crank spindle specification before purchase.