Smaller cranks for Onza

Is it easy getting smaller cranks for the Onza Muni, to use it for commuting.
My guess is that it isn’t
Rusty

You can get the 140 cranks from here http://www.unicycle.uk.com/shop/shopdisplayproduct.asp?catalogid=524 which will make it into an alright speed unicycle, but not very fast for commuting.

Other than that, I think you can’t get any smaller sizes.

Joe