Press fit bb and mid drive onversion

Bjl

Just Joined
Oct 19, 2019
2
0
I have a nice Cube gravel bike that I've put flat bars on, it would make a great donor bike for a mid drive conversion. The only problem I'm not sure about is that it has a press fit bb . Works it be possible to put a bsa threaded insert into the bb to accomadate a bafang or tongsheng motor . Cables under bb may possibly need rerouting too .q55285
 

Bikes4two

Esteemed Pedelecer
Feb 21, 2020
877
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Havant
I've no idea as to the sizing of the bottom bracket system that you have, but if there's room for a BSA type insert then Ceeway ( https://www.ceeway.com/ ) might well have something for you.

Years ago the BB on my carbon frame Trek Madone gave up the ghost and no dealer would consider a repair. I got a steel insert from Ceeway and with some monor tinkering and a fair bit of industrial grade epoxy, the BB insert was fitted - that was some 10 years ago and a few thousand miles on and there's never been a problem.
 

Peter.Bridge

Esteemed Pedelecer
Apr 19, 2023
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saneagle

Esteemed Pedelecer
Oct 10, 2010
3,516
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Telford
You'll have to fabricate something to stop the motor rotating around the BB when you have a PF BB or adapters. The TSDZ02 has such a bracket that fits some bikes, but not others. It looks like it won't fit yours, but your photo isn't sufficient to be sure.
 
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