plastic bb cup question
- Thread starter benjy
- Start date
Godwin_Austen
Retro Guru
Re:
It doesn't necessarily follow that the play on the inside of the cup means the outside of the cup (i.e. where the thread is) is bigger by the same amount - it could be that the cup is just 'thinner' - if you see what I mean.
Can you just use the alloy cup from the old BB? If you can it's probably the way to go - the splines on the plastic ones can break a bit too easily when you try to remove them which can be a pain in the ar*e.
If not just grease both the threads on the BB cup and the frame (clean the latter with a rag / toothbrush first to check there's no crap in the thread) and gently give it a go and see if it goes in cleanly. Don't force it...
It doesn't necessarily follow that the play on the inside of the cup means the outside of the cup (i.e. where the thread is) is bigger by the same amount - it could be that the cup is just 'thinner' - if you see what I mean.
Can you just use the alloy cup from the old BB? If you can it's probably the way to go - the splines on the plastic ones can break a bit too easily when you try to remove them which can be a pain in the ar*e.
If not just grease both the threads on the BB cup and the frame (clean the latter with a rag / toothbrush first to check there's no crap in the thread) and gently give it a go and see if it goes in cleanly. Don't force it...
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I avoid them. Doesn't inspire confidence.
cherrybomb
Old School Grand Master
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Re:
Inside the loose cup the very end is tapered. The BB is only supported by this part of the cup once everything is tightened up.
Inside the loose cup the very end is tapered. The BB is only supported by this part of the cup once everything is tightened up.
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