Motard660 Posted September 30, 2014 Posted September 30, 2014 Can anybody advise me on Bottom Bracket Bearing. I currently have a Shimano XT crank and need to replace the Bottom Bracket as the one side bearing is completely stuck. I overheard one day there is a type of Bottom Bracket that you can get and with that you can actually just change the bearings instead of the whole thing?? Do anybody know anything about that?
rouxtjie Posted September 30, 2014 Posted September 30, 2014 They are not technically meant to be serviced, so if the/a bearing/s go, you screw out both cups, moer weg and buy a whole new unit. But there is a thread about servicing them...done it myself and although you dont get the life span if you had to go buy a brand new one, it does the job for a good while
rouxtjie Posted September 30, 2014 Posted September 30, 2014 here you go https://community.bikehub.co.za/topic/13383-bb-external-bearings-the-cheap-rebuild/
Motard660 Posted September 30, 2014 Author Posted September 30, 2014 here you go https://community.bikehub.co.za/topic/13383-bb-external-bearings-the-cheap-rebuild/ Thank you!! Very interesting reading and a great thread! I will just follow your advise and get the whole thing from a bike shop later today. The existing one gave me a over 7000 km and presume that I cant really complain about it then.
tombeej Posted September 30, 2014 Posted September 30, 2014 Thank you!! Very interesting reading and a great thread! I will just follow your advise and get the whole thing from a bike shop later today. The existing one gave me a over 7000 km and presume that I cant really complain about it then. Just go to your local Bearing Man with the sealed bearing that has seized and get a replacement. Much, much cheaper than replacing the whole BB.
rouxtjie Posted September 30, 2014 Posted September 30, 2014 Thank you!! Very interesting reading and a great thread! I will just follow your advise and get the whole thing from a bike shop later today. The existing one gave me a over 7000 km and presume that I cant really complain about it then.No no...I am not saying you should replace it the whole thing, try a rebuild as per that thread...really much cheaper than a whole new bb.
tombeej Posted September 30, 2014 Posted September 30, 2014 And if you don't know how to get that sealed bearing out, a suggestion is to take it to your LBS and get them to remove your BB for you and show you how to pop it out safely (if you have a good relationship with them they will be more than happy to show you). It will be a quick, yet important learning experience for being able to service your BB yourself in future. In return for their help, pay them a couple hundred bucks for their trouble and buy your BB tool from them
Motard660 Posted September 30, 2014 Author Posted September 30, 2014 And if you don't know how to get that sealed bearing out, a suggestion is to take it to your LBS and get them to remove your BB for you and show you how to pop it out safely (if you have a good relationship with them they will be more than happy to show you). It will be a quick, yet important learning experience for being able to service your BB yourself in future. In return for their help, pay them a couple hundred bucks for their trouble and buy your BB tool from them Thank you I am familiar with taking the crank out and to take the BB out as well. Did it a few times when replacing rings act. The only thing was that I overhead a conversation a while ago where this person bought a specific BB that is easy to replace the bearings. Well after i read and saw Rouxjie post it is easy enough to take it out of the original aluminum casing and to replace the bearing.
dirtrider Posted September 30, 2014 Posted September 30, 2014 7000km on a BB cup is good . But to be honest I haven't rebuild a cup in ages , because I got hold of a handful of old US cups from a BS and rebuild them all a few years ago . Still using that batch and got about 6 pairs left . The set on my SS are going for 6000km now .
rouxtjie Posted September 30, 2014 Posted September 30, 2014 7000km on a BB cup is good . But to be honest I haven't rebuild a cup in ages , because I got hold of a handful of old US cups from a BS and rebuild them all a few years ago . Still using that batch and got about 6 pairs left . The set on my SS are going for 6000km now .lol, really the thing with shimano BSA BB's, they too good for their own good.
hayleyearth Posted September 30, 2014 Posted September 30, 2014 I went to Bearing man the other day and was quite shocked with their prices. (I bought pivot bearings though). Maybe look at Enduro bearings from Rush sports....I would have paid 1/3 for the same thing. So phone BMG before you go to compare.. http://www.rushsportscycling.com/Store/ByCategory/Wheel-and-BB-Bearings.aspx I believe in rebuilding BB bearings. I actually cleaned out one last night and build it back up and it feels almost like new. It can last quite a while longer now again.
tombeej Posted September 30, 2014 Posted September 30, 2014 Ja I saw that whole thread about servicing a sealed bearing. Pointless to me - I just buy a new sealed bearing and install. Cheap, quick and painless. Some people are fiddlers. I'm just not. They love spending time doing that sort of stuff (servicing a sealed bearing). I definitely do not. But I don't think either type of person is right/wrong - whatever floats your boat is cool. I just have better things to do with my day to be honest.
Marnitz Nienaber Posted September 30, 2014 Posted September 30, 2014 Chris King bearings are serviceable.
rouxtjie Posted September 30, 2014 Posted September 30, 2014 Chris King bearings are serviceable.That be true...they are Just big intial outlay.
Josh111 Posted September 30, 2014 Posted September 30, 2014 I did exactly as the thread above says but before that came out. I just took an old BB30, didn't think it would be too much work, popped them out and put new ones back in. the only tools I needed was a screwdriver and hammer, much better than replacing the whole thing. No problems since and it's riding smooth. I've also replaced bearings on a pressfit, pretty much the same story. I know this might be irrelevant to most people but I converted (with the help of an expert) a Shimano pressfit with Shimano bearings in to a "Sram pressfit" by popping out the bearings, filing a little bit of the cup away (everything had to be measure precisely) and inserting Sram bearings. You can do pretty much anything yourself with a little bit of time, which I obviously have too much of.
Brian Fantana Posted September 30, 2014 Posted September 30, 2014 I did exactly as the thread above says but before that came out. I just took an old BB30, didn't think it would be too much work, popped them out and put new ones back in. the only tools I needed was a screwdriver and hammer, much better than replacing the whole thing. No problems since and it's riding smooth. I've also replaced bearings on a pressfit, pretty much the same story. I know this might be irrelevant to most people but I converted (with the help of an expert) a Shimano pressfit with Shimano bearings in to a "Sram pressfit" by popping out the bearings, filing a little bit of the cup away (everything had to be measure precisely) and inserting Sram bearings. You can do pretty much anything yourself with a little bit of time, which I obviously have too much of. It is better to use a pin punch to remove bearings than to use a screwdriver. The risk of damage is greatly reduced when using a pin punch and screwdrivers are not designed for hammer blows.
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