I have an FSA crankset (Gossamer) which is BB386 EVO
I want to replace it with a regular Gossamer crankset (BB30)
What do I need to do? New BB? or is there an adapter of some sort?
As I understand it, BB386 is a threaded bottom bracket where the bearings sit outside of the frame to allow the same size bearings as PF30. Its a way of trying to achieve all that was supposed to be good about PF30 but without all the problems that come with press fit etc.
As said, it therefore requires wider crank spindles so you have to get the correct BB386 cranks.
UNLESS - I think the screw fit in the frame might be the same as BSA standard/Shimano Hollowtech - so if you are prepared to replace the bottom bracket aswell, you might be able to fit corresponding crankset.
Dont go pressfit (BB30) tough, even if you could get an adapter - I see no ends of problems with these.
I would stick with BB386 or go Shimano Hollowtech (check that I am right before making that change though - just in case I am not!).
Actually, just looking, its about as clear as mud:
"Anyway, the new BB386EVO system is press fit and uses an 86.5mm bottom bracket shell width – the frame is wider down there than currently and the axle is as long as that of an external system. And the axle diameter is 30mm – the same as BB30.
Clear? Okay, so what are the advantages? According to FSA:
• The BB386EVO axle, 30mm in diameter, has a higher stiffness-to-weight ratio than the 24mm axle of a system like MegaExo.
• The bearings are positioned further apart than with BB30 for increased stiffness and stability.
• The BB386EVO crank arms are straighter than those you get with BB30, making for more rigidity.
The other major factor in its favour is that the BB386EVO crank system is compatible with threaded bottom bracket shells. In other words, although it’s essentially a press fit system, you can get a BB386EVO bottom bracket that’ll fit a threaded 68mm BB shell, so you can use new standard cranks on an old standard frame."https://www.ribblecycles.co.uk/fsa-bb36 ... m-bracket/
Yes - it looks like this was created as a new 'standard' to allow working with all types of frame (threaded and press fit).
My Whyte Cornwall uses the threaded version I linked to above, so the frame is standard BSA and would take a Hollowtech BB and cranks. (A discussion here: http://road.cc/content/forum/146581-fsa ... patibility)
But it seems that BB386 EVO may also be used in press fit, non threaded frames.
So you need to find out what type of frame you have first!