bottom bracket Tiagra BB-RS500 steel 70 mm silver/black

Description

Shimano Tiagra bottom bracket Hollowtech technology stands for an extremely light, hollow crank arm that also retains its stiffness. This was developed by Shimano using proprietary forging technology. The addition of HollowtechII technology integrates the bottom bracket with the right crank arm to achieve a high-dimensional balance between more stiffness and lower weight Specifications: Model: BB-RS500 Series: Shimano Tiagra 4700 Series Color: silver / black Material: steel Bike type: road bike Bottom bracket length : 61 mm Installation width: 70 mm Bottom bracket type: Hollowtech II Type of wire: Italian thread Weight: 92 grams