Originally Posted by
mtnbke
Okay...teach me to fish.
Why not use a crank longer than 190mm on a conventional frame? Because of the likelihood of clipping a pedal?
I know this isn't the answer you're looking for, but... I just don't see why you would want crank arms that long. It's true that longer arms give more leverage, but in my experience any crank arm over 150 mm or so gives perfectly adequate leverage for my purposes. And it's not because I'm too short (I'm 6'). I gather you're bigger than me (how tall are you?), and can handle something longer; and from your handle I gather you do more off-road riding than I, so longer crank arms may be justified. But longer than 190? I just can't see why anyone would need that.
Can you maintain a cadence of 90 rpm indefinitely? If not, I'd suggest you work on that.
I know, I know, this isn't the answer you were looking for. I'll shut up now.