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@Christophe_Cassette
Hey,
The links don't seem to be working.
On the bottom backet the dimensions you need to know to check it's right for your frame are...
I think this frame is a Peugoet PB14 - but i'm sure there's more Peugeot experts here that can confim.
http://www.velobase.com/Velos/ViewModel.aspx?ID=154434F6-3254-4D4B-B4F5-D890964C0D88&Enum=202&AbsPos=3&SearchID=fffb9076-54d4-41f4-9e1b-475bc110fa98&PgOffset=0
http://velospace.org/node/31890
So i think you need a 68m English thread bb, but if there's a bottom bracket already in the frame you're replacing it might have markings to suggest the model or dimensions.
Pretty satandard though.
Also, you can get differnt types of tapers and lengths for the bb axles.
The length of the axles will affect your chainline
and the tapers are either ISO of JIS type so you just need to check both will fit.
Here's more info:
http://www.sheldonbrown.com/bbsize.html
http://www.sheldonbrown.com/chainline.html
Hope this helps