If you are looking for a unicycle that is high quality and versatile across many disciplines of riding, including learning to ride. You are in the right place. The Nimbus II 20" is tough with its double walled rim and ISIS hub and cranks.
Saddle: Nimbus (black) with front lift handle
Seat post: Club 25.4mm x 300mm steel, welded rectangular bracket
Seat post clamp: Nimbus (black) double bolt, 28.6mm
Frame: Nimbus II 20" (chrome) steel with 42mm machined maincap bearing housings
Hub/axle: Nimbus ISIS (black) 36H, hardened CrMo spindle,100 mm center bearing to center bearing
Spokes: 14G. stainless Chrome (186mm in length for 3X) with silver nipples
Rim: Nimbus 20" (black) 36H, 32mm wide, doublewall, reinforced eyelets, aluminum
Rim strip: Rubber
Tube size: 20" x 1.95 - 2.125"
Tire: Duro Performer X - 20" x 1.95
Crank arms: Nimbus VCX ISIS 114mm
Pedals: Nimbus Black PLastic, 9/16 threads
Bearings: 22mm x 42mm
Approx. cycle weight: 11 lbs.