Home   Login


BB30 Evo uses 30 mm diameter press fit bearings rather than the 24mm bearings used by Shimano Hollowtech cranks. But with Hollowtech, the bearings are on the outside, but with 365 EVO, the bearings are back inside the shell. This is possible because the shell is much wider.

The BB30 bottom bracket shell is typically 68mm (road) or 73mm (mtb) wide with an inside diameter of 42mm. Originally the BB30 system was designed to use 30mm diameter crank spindles. However, frame's with BB30 shells can be used many other sized crank spindles. A BSA shell is 33.6mm

See the table in

  Inner Shell
  Diameter Width -------------------------------------------------------------------
  BSA threaded 33.6 68-73
  BB30 42mm 68,73,84.5
  386EVO 46mm 86.5

The 6806 is a 30 mm Ball Bearing that can be used in many rotary and factory automation applications. The 6806 Deep Groove Ball Bearings is an open style bearing.