Help figuring out the correct replacement BB and crankset combo
So after a hell of an ordeal getting a set of old cranks off and bottom bracket out, I now need to figure out which replacement parts to order so I would really appreciate any advice!
Here are the details:
Old BB was 68mm * 117mm
Old crankset was Shimano Altus with 38 31 22 rings or something similar
The front derailleur is BB mounted
So far I have found two cranksets that seem suitable:
and here are the shimano techdocs for both of those:
So from what I can derive it looks like the fc131 needs a 122.5mm spindle, but I cant figure what the M442 needs. There is also the (-E) and (-K) prefixes that I know relate to front derailleur type but I don't get how to use that info - can anyone shine some light on that? As I said my derailleur is mounted on the bottom bracket. If it says (-e) after a certain bottom bracket, does that mean it is what I should use, and (-k) I should not use?
So can anybody figure out which crankset / BB spindle length combo I should go for?
As for the BB I guess I will go for UN-26 or UN-55
Thanks in advance