Just wandered what others' opinions are here on crank length. I looked back through and couldn't find much on this board.
I've got 170mm which came on the B2. I'm just under 6ft, so didn't expect this to be an issue, but I do have a relatively longer body and shorter legs. Got a tiny bit of knee ache at first after I was pushing in higher gears, but put that down to over-eagerness. I'm now up to about 2 months ~800km, I know about spinning, but I'm still finding some ache unless I keep the torque quite low.
I've experimented a fair bit with boom length and foot inward/outward angle. I think I've reached an optimum there (definitely got some improvement), but the issue hasn't gone away entirely.
I know there's information out there on the web, really I'm asking for personal experience of anybody on here who's tried short cranks. (I could ask Dtek if I can have a try on shorter cranks; but I'm trying to avoid commiting to spending more money when I'm not sure, so I'd like some of your experiences)