Shimano Ultegra SM-BB6800 Bottom Bracket

Shimano Ultegra SM-BB6800 Bottom Bracket Info

The Shimano Ultegra SM-BB6800 Bottom Bracket has received the same attention to detail that the rest of the 6800 group redesign has, and the results will surely take some of the struggle away from your serious pedaling.

Since the first thing a bottom bracket should be is durable, Shimano has positioned the bearings further outside in order for an overall better weight distribution as well as greater stability, which translates into improved power transfer, and less torsional force on the bearings. The steel bearings themselves are smaller, too, which accounts for some of the weight savings the component can boast of versus older Shimano Ultegra bottom brackets. Since Shimano was at the forefront of external bearing technology, it should be no surprise that they continue to push the boundaries of what can be developed and improved. An example of that initiative is how they have refined the sealing elements that significantly reduce drag. Shimano puts the number at 50% less drag than the 6700 series; whatever the math tells them, using the Shimano Ultegra SM-BB6800 Bottom Bracket will tell you that the pedaling is so smooth and effortless you feel like you’re riding on air.

Available in both the Italian (70mm) and English (68mm) threading as well as a Pressfit, the Shimano Ultegra SM-BB6800 Bottom Bracket is designed to work exclusively with the Shimano Ultegra FC-6800 Hollowtech II Crankset.