Shimano Road SM-BB72-41B középcsapágy Precsatlakozó-Fit

Press-Fit bottom bracket with maximum efficiency

The Shimano ULTEGRA bottom bracket has a particularly long service life thanks to the reliable bearing and sealing elements from Shimano.

highlights

• Optimum power transmission - efficiency due to low weight
• 14 g lighter and 50% less friction compared to the SM-BB6700 with the same load capacity

specification

Technologies used

In this chapter we explain the technologies that the manufacturer uses in this product.

press fit

In order to take the needs of the consumer into account in the best possible way, Shimano has developed press-fit bottom brackets. Here, too, your goal is: maximum efficient pedaling.

The bottom bracket axle is guided stably by the wide bearings. The basis is the HOLLOWTECH II technology, which stands for highly efficient power conversion.

HOLLOWTECH II

Perfect balance between stiffness, stability, weight and rotational efficiency. The concept of the HOLLOWTECH II technology was geared to the production of an optimized crankset that minimizes the effort required by the driver for the drive. The high rigidity of the crankset ensures efficient power transmission when pedaling, while its low weight relieves the rider, especially over longer distances. The development of the crankset was carried out with a view to an optimal ratio between rigidity and low weight. HOLLOWTECH technology enables extremely lightweight, hollow crank arms that are manufactured using SHIMANO's exclusive forging technology for maximum rigidity. In addition, the right crank of the HOLLOWTECH II set is firmly connected to the axle of the bottom bracket, which achieves an optimal balance between maximum rigidity and minimum weight. The externally mounted bottom bracket offers better weight distribution and more stability, which ensures more efficient power transmission.

When developing the HOLLOWTECH II crankset, value was placed on an optimal ratio between rigidity and rotational efficiency as well as low weight and an attractive appearance.

High quality precision seals. The HOLLOWTECH II crankset also features high-quality precision seals in the bearing area to extend durability and maintain excellent rotational efficiency over the long term.

scope of delivery

• 1 x Shimano Road SM-BB72-41B bottom bracket Press-Fit (see item description for details)