I own 3 Unicycles and 2 other Wheels that I cant really class as unicycles.
The one I use the most is my 20" Freestyle Custom ( soon to be replaced )
XXX Wheel Set, Wall Tire, Nimbus 1 flat frame, 102 cranks, Myata Seat, Onza seat clamp
I got my Trials almost 2 years ago and its a Onza
Pretty Much standard but Myata carbon fibre seat and Dx Pedals