Caleb F

Do mountainbike races usually have rules?

XC races...

do they care about 29ers or brakes, or anything like that? would they object to no air tires?

salsa

General Racing Rules
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1. Ignorance of the rules is not an excuse. All racers are expected to understand and comply with these rules.
2. Racers shall complete the entire event on the same bicycle with the exception of cyclocross races where bike exchange can only be done in approved areas.
3. Racers must perform their own bike repairs.
4. Racers must carry their own spare parts and tools. Cannibalizing of other bikes is not permitted.
5. Food and water can be taken from anyone, anywhere on the course.
6. Racers taking food or water must not impede the progress of other racers.
7. Racers riding bicycles have the right of way over racers pushing bicycles. When practical, racers pushing should yield the most rideable portion of the trail when being passed.
8. A racer pushing or carrying his or her bicycle can overtake a racer riding his bicycle provided that it does not interfere with the riding racer.
9. Riders must alert those they are passing (lapping) vocally using the announcements "PASSING on your LEFT (RIGHT)!" or "TRACK LEFT (RIGHT)!" It is the responsibility of the passing rider to overtake safely. Riders being lapped must yield at the first reasonable opportunity.
10. When two riders are vying for position, the leading rider does not necessarily have to yield position to the challenging rider. However, a rider may not bodily interfere, intending to impede another rider's progress; this is considered to be highly unsportsmanlike behavior.
11. Short-cutting the course by any racer shall result in a disqualification.
12. Foul riding, use of profane or abusive language and other unsportsmanlike behavior will be taken very seriously. Such behavior by any racer shall result in a warning or disqualification. This will be strictly applied when such behavior is directed at course officials, volunteers or spectators. The penalty imposed is at the discretion of the race director.
13. Federal, state and county laws and ordinances will be abided by at all times.
14. Only riders officially registered in the event or persons designated by the promoter should ride on the racecourse during the event.
15. Protests can be made only by registered racers. Protests will be made in writing and delivered to the race director any time after the end of the race, up to 30 minutes after the posting of the final results. Protests should contain any information that supports the protest, including description of the incident, witnesses, names, addresses, phone numbers and signature of protestor. A $25 fee shall be submitted, in cash, with the protest. The race director, after his own discovery, will promptly rule on the protest. The fee will be forfeited to the race director if the protest is denied or refunded if the protest is upheld.
16. The race director has the final say in any ruling.
17. Wearing of a helmet is mandatory while warming-up for, or racing in, any WVMBA sanctioned event.
18. Bicycles shall be in good repair with both front and back brakes in good working order.
19. Violation of any of the above rules may result in disqualification.

apclassic9

Those are WV rules - NORBA/UCI have slightly difference ones - mostly dealing with food/water/technical stations. Nothing about the actualy bikes, though.