Is BB30 the same as BB92?
Is BB30 the same as BB92?
Nope. The spindle on a BB30 crankset is too large (30mm) to fit through the hole in a BB92 BB shell and still have room for bearings. The spindle size on a crankset that is compatible with a BB92 is 24mm. You can go the otherway though…
Is BB30 same as BB90?
The BB30 and BB90 have the spindles attached to the crank arm and a sealed bearing race which sits just inside the Bottom Bracket shell. The design essentially enlarges the frame’s Bottom Bracket shell both in diameter and width to 87mm (BB30) and 90mm (BB90).
Does BB30 fit BB90?
the quick answer is ‘no’. BB30 uses a 30mm spindle, BB90 is designed for 24mm.
Can you convert BB90?
There is no conversion. The current Trek BB90 bottom bracket w/ steel bearings for Shimano cranks is part# 524555. This is the newest version w/ the plastic reducer/bearing shield you are talking about.
What cranks fit BB90?
Which crank fits on which frame?
| Frame BB Shell Standard | ||
|---|---|---|
| BB90/95 | ||
| Crank Spindle Standard (Spindle OD in mm) | SRAM/Truvativ GXP (24mm) | Perfect Fit |
| FSA MegaExo (24mm) | Perfect Fit | |
| Campagnolo Power-Torque (25mm) | No Fit |
What is a BB90 crankset?
The design essentially enlarges the frame’s Bottom Bracket shell both in diameter and width to 87mm (BB30) and 90mm (BB90). The large bearing units are then pressed into the Bottom Bracket shell and the crankset is attached in the same way as an external/outboard Bottom Bracket system.
What is the difference between a BB30 and BB90 frame?
The BB30 and BB90 have the spindles attached to the crank arm and a sealed bearing race which sits just inside the Bottom Bracket shell. The design essentially enlarges the frame’s Bottom Bracket shell both in diameter and width to 87mm (BB30) and 90mm (BB90).
What size crankset does a CeramicSpeed BB fit?
Compatibility Originally designed for BB86 cranksets and bearings. New integrated CeramicSpeed BB fits 30mm spindle cranks Other notes Threaded shell can be made with better tolerances and can be replaced if it wears out. CeramicSpeed now offers a fully integrated bearing (akin to T47) that will fit 30mm spindles
What is BB90 and how does it work?
Effectively, the space previously taken up by the bearing cups can now be used as frame real-estate, allowing larger (and stiffer) tubes to be used. Trek’s BB90 system uses the same bearings and bearing locations as a conventional threaded system, but eliminates the cups entirely. Bearings are pressed directly into precision-molded carbon seats
