Another square taper question as my google powers have failed me.
I have a square taper bb, all fine but the non-drive side sleeve thingy is plastic and cracked – all i want to do is replace that with a metal one…but seems it’s not a part you can buy on its own?

It’s not specific to each bottom bracket (assume same for all 68mm shell BBs) so strange that I can’t find one.
Am I just calling it the wrong thing or is it just that BBs are so cheap you’re just supposed to buy a new one?

cheers

Posted 2 months ago

They’re not something that generally wears out, so they come with the BB. If you’re on good terms with a bike shop, they will probably have a bunch of them in their junk heap.

Posted 2 months ago

theres a few on ebay (resin mostly from my quick search..) not cheap tho compared to a new BB…

do a search for bottom bracket cup as opposed to sleeve..

id just buy a new BB and keep it for a spare looking at the prices of the ‘cups’

Posted 2 months ago

While they are not specific to each bottom bracket there are different sizes so you can’t just buy a ‘spare’ and assume it will fit. I suspect even if it was available it’ll be half the price of a new BB. I’d go with the advice above, a friendly chat with a bike shop or buy a new BB and keep the other bit as a spare.

Posted 2 months ago

I would imagine that your time and money is much better spent on a new bb.

Posted 2 months ago

Thanks all. Will ask about, but does look like its a case of just buying another BB – cheers

Posted 2 months ago

Your best bet is the spares bin at a friendly local bike shop.

As above – they aren’t always interchangeable. I’ve had to tickle Shimano metal cups in a lathe so they would fit in place of plastic ones.

If the plastic NDS one is just a single crack then they will still work – just don’t go crazy with the spanner.

Posted 2 months ago

Any regular bike shop mechanic should be able to dig one out of their bin for you.

Posted 2 months ago

https://www.ebay.co.uk/itm/123428895162?var=423835216147&chn=ps&norover=1&mkevt=1&mkrid=710-134428-41853-0&mkcid=2&itemid=423835216147_123428895162&targetid=1055001932327&device=c&mktype=pla&googleloc=9044936&poi=&campaignid=10204071303&mkgroupid=104953043274&rlsatarget=aud-629407027105:pla-1055001932327&abcId=1145987&merchantid=7308924&gclid=CjwKCAiAtK79BRAIEiwA4OskBh5fydmSU8QVkg6GrtaBBeQGgrIbQQmOjm-rvPLHqT-ib2YOA-HUexoCdlYQAvD_BwE

One of those could well be just the ticket

Posted 2 months ago