Bearings
Unicycle bearings are industry-standard
sealed bearing units. They are fully en-
closed and don’t require servicing. QU-AX
bearings have an outer diameter of 40mm
(square-taper) or 42mm (Q-axle, ISIS), mak-
ing them compatible with almost all
popular unicycle frames.
Crank-arms
The crank-arm length has a crucial influence on the
transmission ratio of the unicycle; a longer cranks gives
you more control and a shorter crank gives you more
efficiency. The length is a very personal choice - de-
pending on your riding-stile and type. A long crank, for
example, can be helpful for small pilots to easily control
their speed down a hill. Typical lenghts are e.g.:
16-18“: 102 mm
20“: 114 mm
24“: 127 mm
For multi-purpose,
cranks with 2 holes are available.
Frames
There are two types of frames: those with a
rounded crown (the ‘shoulders’ of the frame)
and those with a flat crown. Freestyle riders
prefer a flat crown, because they can place
their feet on it for “wheel walking” and
other tricks. Freestylers also like the so-
called “long’necked” frames; on these,
the seatpost clamp is as high up as
possible to keep it clear of the rider’s
knees whilst they perform tricks.
The material a frame is made from is
less important than that of the cranks
as the frame experiences far less stress.
Cro-Mo and alloy frames have the
advantage of being lighter and
more resistant to rust. For trials
and muni frames you should choose
a flat, narrow crown without sharp edges
- which could injure you. Some frames already
have disc- or magura-brakemounts brazed-on,
so a brake can be fitted at some point in future
without difficulty. Alloy frames are lighter - and still
more rigid.
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