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Are you saying I might be better off asking for a normal PF30 shell? It might not be too late to change it, depends on if he'd made the shell yet or not.
I am spekaing with him later on this week anyway, but want to armed with as many facts and info etc etc
ExTra-
Are you using internal Di2 cable routing and / or internal brake cable routing through the BB? If so it's possibly worth it. Just bear in mind you will be using 30mm spindle cranks from SRAM and whatnot. There's probably a 24mm BB out there for it so you can use Shimano cranks but it's going to be niche and probably spendy IDK.
Personally I'd ask why a normal BSA shell absolutely will not work in your situation. And why they wouldn't 'just' use a PF30 shell which is the widely adopted standard.
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Are you saying I might be better off asking for a normal PF30 shell?
Dunno. Do you like creaking noises? If you do, ask for PF30. If not, got for a threaded BB.
Howard
Brommers
Not really as it’s the same width as a PF30 shell but then you have to screw cups in to it anyway...which you could do with a BSA shell.
It’s basically an idea for small batch frame builders who want a meaty BB shell but don’t want the hassle of making good a PF30 interface after fixing it in place. There’s not much in it for their customers over a normal BSA shell. Maybe more space for internal routing and stuffs.