Bb30 Crank Bsa Frame

Pf42 also known as bb30 bb30a bb30ai bbright direct fit the term pf42 refers to the inside diameter of the shell.

Bb30 crank bsa frame. We currently make bottom brackets and adaptors for bsa bb30 and pf30 frames and are working on bb86 bottom brackets. These days bsa iso and english are used interchangeably to refer to what is now considered to be a standard threaded bottom bracket shell or bottom bracket. They use a 29 64mm spindle however the problem is bb30 cranks are designed for a narrower q factor so the chain line won t be very good and getting that right is the difficult part. Solution to annoying creaking from bb30 bearings directly installed in the frame.

But with the introduction of bsa30 companies introduced an outboard cup with a larger diameter bearing that would allow 30mm spindles to pass through the bottom bracket and the bottom bracket shell. It may or may not be worth it but it looks great and it can be done. If you have above average strength you may reach 40 nm or more. Most outboard bottom brackets for bsa threaded frames originally were designed around cranks with a 24mm spindle.

121mm bb30 spindle 91g. Well really all you have to do is get some vuma quad cups rotors new bsa 30 cups should theoretically work as well though i m not aware of anyone trying it. C bear pf42 30 instead of pressing bb30 bearings direct into the frame bearings in aluminium housing are pressed. Turning the bearing cup with the wrench to the point where no more movement possible will give you a torque setting of between 35 38 nm.

Frames with bb386 evo shells should be able to run almost any crank. This configuration makes for a weight savings of 70g from the previous setup to the integrated chain ring setup. Si crank bolts 14g. Recommended torque is in the range of 35 nm to 45 nm.