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 Post subject: What size BB
PostPosted: Tue Sep 01, 2009 5:44 pm 
Dirt Disciple
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Joined: Mon Aug 03, 2009 10:08 pm
Posts: 31
Location: Wirral
Bearing surfaces worn so need a new one.

Ita an old Tange, JIS square taper, standard 86mm, but I can't decide on the overall lenth. wWithout the ue of calipers, (which I haven't got as I'm Billy-no-mates as far as bikers are concerned), :( its either 122mm, 122 1/2mm or 123mm. So is 1mm critical if I get it wrong and is it better to go a mm over than under.

And I suppose the new sealed type would be a lot better.

Pete.


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 Post subject:
PostPosted: Wed Sep 02, 2009 12:33 pm 
rider | rBoTM Winner
rider | rBoTM Winner
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Joined: Fri Jan 25, 2008 1:42 pm
Posts: 5133
Location: Wakefield, Yorkshire
What chainset are you using it on? There's some lists of suitable chainset/axle combinations here -

http://www.bikepro.com/products/bottom_ ... able.shtml

Yours might be listed.


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 Post subject:
PostPosted: Wed Sep 02, 2009 3:14 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8222
Location: New Forest, UK
Essentially 1 or 2 mm is nothing. Shimano ones are probably the easiest to source: a UN54 or (if you can find one) UN72/73 are the simplest choice.


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