The Q-Axle disc-brake unicycles are the successor of the QX disc-braked unicylces. The ISIS axle here has been replaced by a technique that has been used in the cycle industry since 2002: The axle has a 24mm diameter instead of the ISIS-typical 22mm and is more hollow which makes it lighter (the bigger diameter allows a thinner wall). The cranks are no longer tightened as much on the axle as possible - but precisely positioned by an alloy cap and then fixed by tightening 2 allen-key-screws on the crank. The crank-connection has less wear and is more resistant to frequent assembly/dissassembly. Also, just like from tapersquare to ISIS, the connection-surface that transfers the pedaling-power is bigger.
Thanks to the greater hollow-drilled axle, the hub is more than 130g lighter than its ISIS-predecessor. It also makes the axle stiffer. As the bearings still keep the same outer-diameter, the hubs are compatible with all ISIS-ready-frames.
Saddle: Qu-Ax Saddle - Black (may vary from picture)
Seatpost: Qu-Ax Aluminium Seatpost (25.4mm)
Seatpost Clamp: QX-Series 'Doublebolt' Seatpost Clamp (28.6mm)
Frame: QX-Series 'Aluminium' Frame
Tyre:Kenda Karma 29 x 2.2 Tyre
Rim: Black DB 89 x 40mm wide double-walled alloy rim.
Spokes: 36 Spokes
Hub: Q-Axle splined - 36 Hole - Red
Cranks: Q-Axle splined Alloy Cranks - 145mm
Pedals: QX-Series 'Studded' Plastic Pedals
Brake: Shimano BL-M-445 Disc Brake with two piece 160mm rotor
To remove the cranks you will need a Crank Installation Tool for HollowTech II
Weight: 5.83kg incl. Brake + Rotor
Recommended leg length sizes for unicycle:
Standard seatpost: Minimum - 93cm (36.5"), Maximum - 103cm (40.5")
Cutdown seatpost: Minimum - 84cm (33")
These sizes are measured from crotch to floor wearing shoes