On the following page for the Deore OCTALINK Bottom Bracket BB-ES51_m it indicates there are 4 variations for this BB spec - BB-ES51/51-E,BB-ES30/30-E.
I am thinking that the "-E" suffix refers to English thread pattern but also what is the difference between the 51 and 30 variations?
In the " MTB Chainlines - Crankset and Bottom Bracket Configurations" pdf file I downloaded from (http://bike.shimano.com/publish/cont...atibility.html) there is no mention of the Deore FC-M530 crankset, as detailed in the Deore section of the web site, for which the above BBs are specified.
Shimano needs a Question posting form on their web site!
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