Yep. The rear is an M750 9 speed. Not sure what you mean about the cranks. I'll remove them at the weekend. They are used but would be nice with a sand/polish.
I meant are they 104mm bolt circle diameter? So the spacing across the 4 bolts that hold the chainrings.
Also the length of the arms are they 175mm/170mm/165mm they look like they are probably 175mm.
Thanks kyle