Bottom Bracket Adapters
Adapt your bottom bracket to the BSA/JIT English threaded type that mid-drive motors require. Most bikes that originally sold for less than $1500 or are older than 2013 have English threaded bottom brackets and you are good to go. If you have a square tapered spindle for your cranks then you have the required threaded bottom bracket. Around 2012 many higher-end bikes started being fitted with various press-fit bottom brackets many of which can be adapted to English threaded so you can still do a mid-drive motor conversion on them. However, there are some exceptions. For an in depth article on adapting various bottom brackets and the exceptions see this thorough article by Matt Hughes.
We have threaded adapters for 68 & 73mm BB30, 68 &73mm PF30 and any width 2 piece PF41/BB92. Use some Loctite 641 retaining compound on adapter and on the inside of the BB casing before installing to helpkeep motor from rotating. Use some Loctite 7649 for quick set if you are going to ride it same day.
If you have an older style Schwinn or cruiser bike with a one piece crank and American style bottom brackets we have something for you as well. Give us a call.