Shimano - SM-BB71-41B Bottom Bracket-Pressfit Sunrace lightweight and ultra capable on

lightweight and ultra capable on all sorts of terrain

Stan's Race Sealant's combination of large and smaller sealing crystals interlock to form a lattice work that not only seals but strengthens and reinforces the area of the puncture

Mountain Bicycle Tubes available in different sizes and valves

Wrap-around frame for optimal protection

plus an inflator

Shimano - SM-BB71-41B Bottom Bracket-Pressfit Sunrace lightweight and ultra capable onShimano SM BB71 41B is a press fit bottom bracket for the installation of a Hollowtech II compatible crank into a road frame with 86. 5 mm case width. Per usual with Hollowtech II, the bearings have a diameter of 24 mm, as this gives the best combination of rotational efficiency, stiffness, load capacity, tightness and weight even with press fit bearings. SM BB71 41B bottom brackets are recommended for older 10 speed road and cyclocross cranks.