Cross Country Racing
Cross-country (XC) racing is held on a varied terrain circuit, it is normally around 6-8 kilometers (km) and is always a massed-start race. Under the 2006 UCI rules, elite, U23, and Junior Expert riders at UCI sanctioned races, are allowed technical assistance, but only in designated zones and only by an authorized team mechanic. However, riders in the same team can help each other at any point in the race. Under NORBA rules, no technical assistance is allowed. Professional level races are longer in distance, around 50 km.
Cross Country Olympic (XCO)
Short track Cross-country – Short Track Cross Country (STXC). A very short XC style event of about 800m in length but generally about 1 minute 30 seconds in winning time. A short, sharp exciting event to watch and participate in. Also called Cross-country eliminator
Downhill
Downhill (DH) racing is a time trial event. Riders start at intervals that can vary from 30 seconds to three minutes-depending on the stage of the competition – and the rider with the lowest time wins. As the name of this discipline implies, DH races are held in steep, downhill terrain, resulting in higher speed than in cross-country racing. The terrain is also significantly rougher than in cross-country racing. The bike is designed with long travel suspension and hydraulic disc brakes.
Super D
Super D (SD) is a blend of cross-country and downhill. Most of the race is downhill, on trails similar to the downhill segment of a cross-country race. There are also short (100–500m) uphill sections which make the use of downhill bicycles difficult, as a result, most riders use cross-country or ‘trail bikes’. Depending on the trail and race venue, the start may either be seeded (riders start in short intervals), or Le Mans mass start (riders run to their bikes, timing is started when the riders start running). Probably the most famous of this type is the Megavalanche.
Freeride
Freeride (FR) competitions are not so much a race as they are a competition of skill and style. Courses contain varying cliffs, drops, obstacles, and ramps. There are usually a large number of ways in which to complete the course, and scoring is dependent on the competitor’s choice of routes, the fluidity of riding and tricks performed (style), and sometimes also the time in which the course is completed.
Dual Slalom/Dual
Dual Slalom (DS) is a ski-inspired event which pits two riders against each other on two identical man-made tracks side-by-side with the same jumps and berms, with a rider on each track, and the first across the line wins. The contest has a knock-out format. Dual (DL) events are similar, only two riders share the same course/track. So dual is a contact sport.
Four Cross
Four Cross (4X, also known as ‘mountain cross’ or ‘bikercross’) inspired by the dual format and by BMX racing, this event pits four riders on the same course from starting gates to finish. There can only be one winner per event, so the races can quickly eliminate riders making the progression faster for a day’s events. This is the reason it was chosen as the race-format to replace Dual-Slalom by the UCI at World Cup events. 4X also replaced Dual in the UCI World Cup series in 2002. There is a difference between 4X and mountain cross. In 4X, riders are each given a run down the course which is timed and the top 50% of the field then progress to the elimination rounds. In mountain cross, riders are given three heats against three other riders, and points are allocated for your position in each heat. Again, the top 50% progress to the elimination rounds. 4X is the format raced in world cup however mountain cross is the preferred format for amateur races.
Eliminator Cross-country eliminator (XCE)
Marathon
Marathon (XCM) is perhaps the toughest form of mountain biking because riders often have to cover more than 80 km in one race on mountainous terrain. The distances usually vary from 60 km to 100 km. Races often exceed 100 km, but are then termed Ultra-Marathons. Recently UCI has inaugurated the Marathon World Cup. Basically it equals point-to-point (PP) discipline and that means that riders have a mass start from point “A” and they finish at point “B”.
Enduro
Enduro in its most basic definition is a type of mountain bike racing where the downhills are timed, and the uphills are not.[3][4] Riders are timed in stages that are primarily downhill, with neutral “transfer” stages in between. The transfer stages usually must be completed within a time-limit, but are not part of the accumulated time. The winner is the rider who accumulates the lowest combined time from the timed downhill sections. Enduros typically take place over one or two days, but week-long competitions also exist. A typical one-day enduro consists of 3 to 5 timed stages which take place on technically demanding, generally descending terrain, often with sections of singletrack.