Support road.cc

Like this site? Help us to make it better.

forum
road.cc bike forum

30mm crank axle on a 68mm threaded Bottom Bracket

by Bridgeblox
Fri, May 05, 2017 14:47
5

The subject tells it all.    

I've got my hands on a cheap BB386EVO FSA crank that I want to fit to a Planet X London Road, has a standard 68mm wide bottom bracket shell.   I'm aware FSA do a 386EVO bottom bracket, but it doesn't have a great reputation.    

There are a few other manufacturers that do bottom brackets for this shell (i.e. outboard bearings) that will take a 30mm axle, such as Hope and Rotor.  Sometimes they seem to use the 'BSA 30' label.  Are the two - BSA 30 and BB386 interchangeable?   I've had a good hunt around various forums, but can't find a definitive answer. 

Thanks in advance for any advice, Rob.  

 

 

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

Add new comment

5 comments

Avatar
part_robot | 7 years ago
1 like

Worth asking Wheels Manufacturing. They make a huge variety. For instance the BB86 push fit to BB30 bearings I need.

Avatar
Bridgeblox | 7 years ago
0 likes

Thanks again!  That's a push fit, though.  the two halfs of the BB are threaded to engage with each other inside the push fit shell.  It solves the problem of a creaky BB which seems inherent in many pushfit standards.  Ironic that the solution is to return to a threaded BB!  

It's more like this I was thinking of: http://www.chainreactioncycles.com/rotor-bsa-30mm-steel-bottom-bracket/r...

 

Avatar
CXR94Di2 | 7 years ago
0 likes

What about this
http://www.wiggle.co.uk/rotor-ubb-4630-steel-bottom-bracket/?lang=en&cur...

You were right about Shimano size my fault.

Avatar
Bridgeblox | 7 years ago
0 likes

Thanks CXR - a Shimano bearing would be for a 24mm axle (rather than the 30mm axle for the 386) though wouldn't it?

The thing is that I have an old-school threaded bottom bracket - the type of thing that would take a UN-52 cartridge with square tapers in times past.    So FSA do one that fits (see: http://www.ribblecycles.co.uk/fsa-bb368-evo-road-bottom-bracket/) but it doesn't have the best reputation, and I can't find an equivalent 386evo bottom bracket this side of £100. 

Hence my question about BSA 30!      

Avatar
CXR94Di2 | 7 years ago
0 likes

Read this
http://www.bikeradar.com/forums/viewtopic.php?t=13009882

Seems you can use pressfit plastic cups into frame and Shimano threaded bearings.

Latest Comments