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 Post subject: another bb q
PostPosted: Fri Apr 20, 2012 9:27 pm 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
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Location: Herts UK
there's been quite a few posts on BB and versious varietires so here is my q.

would i need to replace BB cups if I want to replace shimano XT hollowtech chainset by a Truvativ Nnoir?

(i thing the answer is yes but not toally sure). :cry:


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 Post subject:
PostPosted: Fri Apr 20, 2012 9:51 pm 
retrobike rider
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Location: The cave of manly things
Truvativ use a gxp bb which is different to a shimano one. You can't use a noir crank with any other bb apart from a gxp or a hope bb with gxp adapters.


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PostPosted: Sun Apr 22, 2012 8:18 pm 
Old School Grand Master
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^^^ yes , I know that ... I guess my q did not come across clearly :(

I need to replace the bottom bracket cups. ... so my question is what BB thread would be found on a 2009 Specialised? I guess English - the other one, Italian would be round mostly on Italian road bikes??? :?

(it has shimano cups fitted - do shimano make external BB for italian trhead, if not, I have my answer :) )


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 Post subject:
PostPosted: Sun Apr 22, 2012 9:22 pm 
Gold Trader
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your bike will have English BB thread for sure!


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 Post subject:
PostPosted: Tue Apr 24, 2012 8:51 am 
Old School Grand Master
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Location: Herts UK
I've had a closer look (it is carbon frame sepcialized) and see no external BB cups; the Spec. blurb describes it as: integrated pipe billet bottom bracket ensure stiffness and efficiency...

..... some lucky googling comes up with this:

BB compatibility


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 Post subject:
PostPosted: Tue Apr 24, 2012 11:58 pm 
Gold Trader
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Location: South Hams - Devon
That looks like you'll need to replace your currently installed PF30 cups with the SRAM threaded ones - stick with Shimano HT2.


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