Choosing a new bottom bracket
robgriffin247
Posts: 22
Hi,
I don't know if this has been answered before but I tried looking and found nothing.
I've just had a bottom bracket replaced in one of my bikes, I left it in the local bike shop for them to repair because it is something I have never done. But this got me thinking, (I have another bike with a BB that is nearing its end) so next time I need to replace one I'd like to have a crack at it my self, I can do all other maintenance my self so I feel like the BB is my weakness!
The problem is I have no idea how to choose a new one - obviously there are a lot of options but I don't know what I can and can't use. Currently it has a Shimano SM-BB4600 (68mm British), attached to a 2010 Specialized Allez Sport Triple. So perhaps someone can give me pointers on what attributes to look for... basically what do I have to make sure is the same when I pick the new one to make sure it is compatible?
Thanks
Rob
I don't know if this has been answered before but I tried looking and found nothing.
I've just had a bottom bracket replaced in one of my bikes, I left it in the local bike shop for them to repair because it is something I have never done. But this got me thinking, (I have another bike with a BB that is nearing its end) so next time I need to replace one I'd like to have a crack at it my self, I can do all other maintenance my self so I feel like the BB is my weakness!
The problem is I have no idea how to choose a new one - obviously there are a lot of options but I don't know what I can and can't use. Currently it has a Shimano SM-BB4600 (68mm British), attached to a 2010 Specialized Allez Sport Triple. So perhaps someone can give me pointers on what attributes to look for... basically what do I have to make sure is the same when I pick the new one to make sure it is compatible?
Thanks
Rob
0
Posts
exo - hope technology for bling
have a look but the cheapest is prob
http://superstar.tibolts.co.uk/index.ph ... h0ogrfeo87
Personally I'd upgrade to Shimano 105 (SM BB 5700) which have better bearings and slightly better seals.
Shimano Ultergra and Dura-ace will also fit but they cost more. Hope bottom brackets are also a good option but they're more pricey.
You will need a bottom bracket tool to remove/replace the cups. Also anti seize grease should be used on the threads when it's installed. It's a straightforward job so good luck.
Just ordered a combo bracket remover tool with the plastic socket bit too (Hollowtec),
2 questions, what type of greese should I use? Waterproof? I have some 'copper anti seize' stuff here - is that any good?
And, what bottom bracket would make a good upgrade - you mention the Shimano 105 - I have made a note of englsih thread only. I see there are a few sizes also - how do I know what I need?
Kind regards,
The 105 external BB cups should only come in one size, and a choice of English or Italian thread. Most require the former. Some places still have the earlier 5600 version, but most are 5700 now. Doubt there's any difference
As has previously been said, as long as it is Hollowtech II, and the correct thread- British or Italian, then any BB can be used.
Is there one which stands out as being good/popular though (within budget of £30)?
Will let you know how the install goes