The Nimbus trials unicycle was designed to ride over obstacles without any part of the rider touching the ground. The obstacles traversed can be set up specifically for the purpose of unicycle trials. These are often walls, railings, ledges and other "street furniture" found in an urban environment (also known as a session style sport).
Although unicycle trials can be performed on a standard unicycle, many are not equipped for the forces. Trials unicycles are designed and built with trials stresses in mind.
Saddle: Nimbus Gel (black) with front lift handle
Seat post: Nimbus 25.4mm x 300mm chromed steel or aluminum with a welded rectangular mounting bracket, 4 hole
Seat post clamp: Nimbus (green) double bolt, aluminum 28.6mm
Frame: Nimbus II 20" (blue) steel with 42mm machined maincap bearing housings
Hub/axle: Nimbus ISIS (black) 36H, hardened CrMo splindle,100 mm center bearing to center bearing
Spokes: 14G. stainless black (167mm in length for 3X) with brass silver nipples
Rim: Nimbus Dominator2, 19" trials (green) 36H, 42mm wide, aluminum doublewall, reinforced eyelets
Rim strip: Rubber
Tube size: 20" x 2.1"
Tire: Nimbus Cyko Lite 19" x 2.5". This is a specific tire for this rim. A regular 20" tire cannot fit this rim.
Crank arms: Nimbus Venture2 (black) 138mm, ISIS, aluminum
Pedals: Nimbus Venture, reinforced plastic body with steel removable pins, backing plate for added durability and CrMo axle with 9/16 threads
Bearings: 22mm x 42mm
Approx. cycle weight: 12 lbs.