Sram-Truvativ DUB Ceramic Bottom Bracket
The bottom brackets for Sram and Truvativ DUB cranksets, featuring high-end ceramic ball bearings. The DUB ceramic bottom bracket represents a whole new level of friction reduction thanks to highly efficient ceramic bearings. The DUB ceramic bottom bracket helps the rider save precious rotational energy without compromising on the robust seals required for real MTB and road racing scenarios.
DUB bottom brackets are specifically designed for 28.99 mm axle diameters and are not compatible with other cranksets. Equipped with high-end industrial ceramic bearings and excellent seals, DUB bottom brackets offer long-lasting, worry-free pedalling.
Industrial ceramic bearings:
Ceramic bearings offer the same qualities in terms of durability, maintenance and performance as the tried-and-tested steel bearings. The key difference lies in the bearing balls used. One of the most outstanding features of the ceramic balls is their incredible geometric perfection and roundness; furthermore, the extremely smooth surface guarantees optimal rolling behaviour and precision fit. Furthermore, they are even lighter and harder. Embedded in external bearing cups, the multi-sealed ceramic bearings are virtually indestructible.
Sram-Truvativ DUB Technical Specifications:
- Application: Road
- Bearings: sealed industrial ceramic bearings
- Inner cup press-fit dimension: 46 mm
- Bottom bracket shell width: 79 mm
- Easy installation and adjustment
Included in delivery:
Sram Dub inner cup sets (BBright) right and left, bottom bracket sleeve, 1 x 2 mm spacer
BBright bottom bracket shell:
The BBright bottom bracket shells have a width of 79 mm and a press-fit dimension for the bottom bracket of 46 mm. These bottom brackets are press-fit.
Sram DUB crank axles 28.99 mm:
SRAM has developed its own axle standard for DUB cranks. SRAM DUB cranks have an axle diameter of 28.99 mm and are only compatible with bottom brackets designed for DUB cranks. The MTB DUB cranks have a longer axle (112 mm) than the road bike DUB cranks (106 mm). This means that MTB cranks can also be fitted to frames with wider bottom bracket shells. There are also Wide Road and Wide MTB cranks. These axles are also longer than standard axles, although the Road Wide axle, at 112 mm, corresponds to the standard MTB axle.
Standard MTB cranks and Boost MTB cranks have the same axle length, 112 mm. The MTB Wide cranks have a 118 mm axle and the Super Boost+ cranks a 121 mm axle, and each requires different bottom brackets or additional spacers.
Herstellerinformation: SRAM, 1000 W Fulton Market #4, 60607 Chicago, Illinois, United States, http://www.sram.com | Contact EU: SRAM Europe Sales and Services B.V., Paasbosweg 16, 3862 ZS Nijkerk, Netherlands, https://www.sram.com
