Shimano bottom bracket SM-BB71 Press-Fit 86.5 mm

Shimano SM-BB71-41B is a press-fit bottom bracket for installing a Hollowtech II crank in a road frame with 86.5 mm housing width. As usual with Hollowtech II, the bearings have 24 mm diameter, because this also gives the best combination of rotational efficiency, stiffness, load capacity, tightness and weight for press-fit bearings. SM-BB71-41B bottom brackets are recommended for older 10-speed road and cyclocross cranks.

Specifications:
Range of use: road, cyclocross
Installation type: Pressfit BB86
Housing diameter: 41 mm
Case width: 86.5 mm
Axle diameter: 24 mm (Hollowtech II)

Technical data:
Bearing: Steel
Material inner bearing shell: synthetic resin

Features:
- Recommended for Ultegra FC-6700, FC-6700 G, FC-6750, FC-6750 G, FC-6703, FC-6703 G / 105 FC-5700, FC-5750, FC-5703 / Tiagra FC-4600, FC-4650, FC-4603 / Sora FC-3550, FC-3503 / FC-CX50 / FC-R603, FC-R563, FC-R460, FC-R350.

Technology:
Hollowtech II
The externally mounted bottom bracket offers better weight distribution and more stability, which provides a more efficient power transmission. The diameter of the inner bearing axle and bearing (24 mm) was an important factor in the development, because the inner bearing axle has a significant impact on the stiffness, stability, weight and rotation efficiency.

Scope of delivery:
- 1 x bearing shell Shimano SM-BB71-41B right, incl. bearing.
- 1 x bearing shell Shimano SM-BB71-41B left, incl. bearing
- 1 x bottom bracket shell Shimano