I have a KH hub from around maybe 2005 (+/- 2 years) with the splined, non-ISIS interface on my 24". I only ride my 24" occasionally and I’m looking for cranks that aren’t 170mm. I use my 24" as a loaner from time to time and the cranks throw everyone off. I seem to be the only person who would ever consider 170mms on a 24" a good idea.
I’m assuming someone has some old cranks laying around that don’t get much use, now that ISIS (the interface) took over. I’m in no rush at all. Don’t be afraid to reply if this post is years old, I’ll probably still have this wheelset regardless.
I do have 170’s. I do enjoy them and they are hard to come by these days, so I’m not certain if I want to part with them, but I’m also not a fan of them sitting around barely being used. Let me get back to you, once I find shorter cranks.
Unfortunately there isn’t a large selection of cranks out there that fit these hubs.
While looking for a different set for my summit I kept coming across the same problem you have. The most common cranks I found available were 165-175mm haro “78” cranks but these are too long. A not so common option is the haro sub C cranks. These are 140mm and have read on here they fit great and are plenty stout.