Originally Posted by
mstateglfr
Compatibility comes down to model(generation) #s.
Sora 3300, r3000, etc.
105 5700, 5800, etc.
List what your components are and what hers are. Without those specifics, its guessing.
I'm not really sure how I check that on the sora stuff, but I'll check the 105 components when I get home. I looked last night and it turns out that she's actually got an FSA crank set, so I'm not sure the existing BB with accept the 105 set.
My current 105 BB is in good shape, so I was going to leave it on my bike, but if she's going to need one, perhaps I should upgrade mine to ultegra and give her my current one. Are there any benefits to switching out my BB to ultegra?