Bottom bracket help

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May 24, 2012, 04:07:08 PM

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[Si2010]

Hi,

I want to replace the bottom bracket off my 09 Commencal Supreme DH. I want to replace it with the same model - Howitzer Team but I have no idea what size I need. I'm finding the sizing very confusing when I do a search for the BB. I have no idea what the various dimensions relate to.

For example, from Chain reactions Website they have the following options listed:

Howitzer Team BB

100mm - 66mm Chainline   
   
68/73mm - 51mm Chainline   
   
68/73mm - 56mm Chainline   

83mm - 56mm Chainline   

[iain1775]

last one - 83mm I believe

[Paasonen]

In 2009 Techbook it only says; LARGEUR DU BOITIER DE PEDALIER 83mm BSA. http://www.commencal.com/web_bicycles/techbook/commencal_techbook_2009_fr.pdf

[peopleschamp2146]

its 83mm. i have two 09 frames. just ask for a 83mm bb

[Steve P]

Si2010, for future reference, sizing these things is as simple as it could be. Just measure the width of the bottom bracket housing on your bike. Voila!