Machines that do not meet these specifications are not
eligible to participate in events:-
Electric bike Wheel specs
Wheel sizes - Standard Wheel - 21" Front - 18"
Medium Wheel - 19" Front - 17" Rear
Small Wheel - 16" Front - 14" Rear
The above is based on the wheels of combustion engined
machines using motorcycle tyres. If
other wheels are used as on current Electric powered
machines then the outside diameter (total
circumference) of the tyre must not exceed that of the
corresponding tyre size.
On electric powered machines fitted with cycle tyres, the
tread pattern limitations do not apply. However the depth
of tread must not exceed 10mm.