I’ve done a few mtb races, and often thought it would have been easier and quicker on a cross bike if the rulles had permitted it.
Then there are races like the 3 peaks cyclo cross which goes on terrain that only Gnarr weekend warriors on 6″ mtbs dare normally conquer..
What??
British Cycling MTB Race rules
2.0 THE BICYCLE
2.0.1 BC in no way wishes to stifle the natural evolution of
the mountain bike in any recognised discipline. To this
end there is only one requirement; that the bicycle is
solely human powered. Any bicycle used in
competition must be capable of safely and efficiently
completing the task and must, as a minimum, be
mechanically sound, have efficient brakes on all
wheels and all reasonable steps must be taken to
ensure the safety of the rider and others. As part of the
latter, bar plugs are compulsory
Whereas 3 Peaks Cyclocross rules
14. The race is for CYCLO-CROSS BIKES WITH DROP HANDLEBARS ONLY.
The use of mountain bikes and road bikes is prohibited. There will be an
examination of bikes before the start and spot checks made throughout the
race. A cyclo-cross bike is a road bike with cyclo-cross tubulars/tyres and low
gears. Disc brakes are allowed. Bicycles must comply with the following
regulations:
* The structure of the bike connecting the saddle, pedals and forks shall be
triangular
* The component parts must be tubes or profiles, the form of which is free
from restriction. The minimum width shall be 25mm. The maximum width
shall be 80mm for the frame and 50mm for the rear stays, forks and seat
pillar.
* Wheels of the bike may vary in diameter between 70cm maximum and
55cm minimum, including the tyre. The width of the tyre cannot be more
than 35mm.
* STRAIGHT HANDLEBARS ARE NO LONGER ALLOWED.
* The use of 27″ or 700mm wheels in mountain bike frames will not be
allowed.
* Commissaire’s decision will be final