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 Post subject: Bottom Bracket
PostPosted: Mon Nov 05, 2007 3:12 pm 
Posh Mark
Posh Mark
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Joined: Wed Apr 18, 2007 2:49 pm
Posts: 5982
Location: As far from the city as you can be ....
Hi Folks,

I need to get a new bottom bracket for my Kona. It needs to be square taper but I have only found basic shimano ones – Any ideas/help?

Much appreciated,

Mark


:D :D :D


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 Post subject:
PostPosted: Mon Nov 05, 2007 3:15 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Wed Oct 05, 2005 7:45 pm
Posts: 10945
Location: kent
Shimano are reliable , you fit them and forget about them . anything else is going to be assle at some points .


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 Post subject:
PostPosted: Mon Nov 05, 2007 3:15 pm 
Retro Guru

Joined: Sun May 14, 2006 5:38 pm
Posts: 936
Location: Sussex
What size? The Shimano UN72/73 is the best square taper BB for the money bar none, can still be found on ebay.


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 Post subject:
PostPosted: Mon Nov 05, 2007 5:28 pm 
Gold Trader
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Joined: Mon May 14, 2007 11:28 pm
Posts: 4742
Location: Scotland!!!!!! Yay, at last, only 4 years waiting!
I agree with Max_P, The 71's are good too, I have had one fitted to my Marin since it was new in '94, and I still don't need to change it.

Tim


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 Post subject:
PostPosted: Mon Nov 05, 2007 6:14 pm 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
Posts: 15807
Location: near cwmcarn
phil wood.


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 Post subject:
PostPosted: Mon Nov 05, 2007 7:25 pm 
retrobike rider
retrobike rider

Joined: Sun Sep 23, 2007 11:22 pm
Posts: 7306
Location: Hove
Mark is right to point this out. Although Shimano are still making XT-level square taper BBs (now called UN-74), they are hard to obtain in the UK (at least online - I haven't tried LBS yet). CambriaBike has them though if you want to import. Even LX-level aren't available online in as many sizes as you'd like to think.

Does anybody know whether Campag BBs with English thread are ok to use with Shimano cranks?


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 Post subject:
PostPosted: Mon Nov 05, 2007 8:21 pm 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
Posts: 15807
Location: near cwmcarn
Anthony wrote:

Does anybody know whether Campag BBs with English thread are ok to use with Shimano cranks?


they both use a 2degree taper, so I dont see why not. older mavic BBs dont make loads on ebay & have a rep for lasting ages if you need a longer spindle. hell i've got the mother of "long spindles" a NOS campag euclid, 140mm!


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 Post subject:
PostPosted: Mon Nov 05, 2007 8:33 pm 
Old School Grand Master
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Joined: Tue Oct 09, 2007 3:12 pm
Posts: 3913
Location: The Shire
Chain Reaction have got UN54s in a fairly comprehensive range of sizes

Image

http://www.chainreactioncycles.com/Models.aspx?ModelID=17473


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 Post subject:
PostPosted: Mon Nov 05, 2007 9:27 pm 
Retro Guru

Joined: Sun May 14, 2006 5:38 pm
Posts: 936
Location: Sussex
Campag, Miche and a few others use an ISO taper, Shimano, Suntour etc use JIS taper. There is a small difference in taper profile. They are not 'officially' interchangeable but many people do so with no problems. For instance I use a Campag road chainset on a UN72 - fixed wheel, off-road...zero problems in practical use.

Mounting a ISO on a JIS it will not go on as far, 3-4 mm or so, the opposite is true the other way round.

I believe Tange make (made) some of Shimano's BBs. UN72/73's can still be found on eBay but an alternative is these:

http://www.benscycle.net/index.php?main_page=product_info&cPath=188_247&products_id=602&zenid=8e316812618a43e02f9f2f315db46b33


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 Post subject:
PostPosted: Mon Nov 05, 2007 9:46 pm 
Gold Trader
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Joined: Wed Jun 20, 2007 11:19 pm
Posts: 7006
Location: Odense, Denmark
Campag chainsets can split if fitted on Simano BBs.

(I've seen it a couple of times but it is a rare occurence)

Never heard of anyone fitting a Shimano chainset on a Campag BB.


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