danstar10

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:
https://www.chainreactioncycles.com/s...t/rp-prod46021
https://www.woollyhatshop.com/Crankse...prod_3149.html

and here are the shimano techdocs for both of those:
M442
https://techdocs.shimano.com/media/te...9830657937.pdf
FC131
https://techdocs.shimano.com/media/te...9830758324.pdf

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

fietsbob

You Could ask the shop you are buying it from..

danstar10

I'm buying online to keep costs down

fietsbob

ask those people, then. they have Email too ..

cny-bikeman

Very few merchants would sell a crankset without knowing what spindle it takes, and usually would have it as well.

danstar10

Is the bottom bracket not also specific to my front derailleur setup? Do you think I would be able to ask the merchant directly then? I hadn't thought of that.