what is the difference between an american and mid bb on a bike?

Evan B

New member
i have a we the people reason 2009 bike. and im getting a new crank and it ask if i want a spanish, euro, mid, or american bb. which one should i get and what is the difference
 
That is refering to the threads on the bb.. I looked at their website and it says it comes with a mid bb so if you're replacing it you'd need to get one with that type of threads or it won't fit.
 
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