You check your pedals if you go over anything likely to strike them, so I don't think longer cranks are a problem.
I've no direct experience of riding sscx but talking to a couple of people they tend to ride a lower cadence than you would on the road to keep the bike pinned over the rough surfaces. I don't know how typical this is, or if longer cranks would be good for this. I'm interested to know as I fancy giving it a go soon.
You check your pedals if you go over anything likely to strike them, so I don't think longer cranks are a problem.
I've no direct experience of riding sscx but talking to a couple of people they tend to ride a lower cadence than you would on the road to keep the bike pinned over the rough surfaces. I don't know how typical this is, or if longer cranks would be good for this. I'm interested to know as I fancy giving it a go soon.