ATB: all-terrain bike
Berm: an embankment on a trail
BMX: Bicycle Motocross is a form of cycling with specialized small bikes. It’s included in the Olympics for the first time this year
Cross Country (XC): riding across the countryside
Cyclocross: an off-road race that involves riders having to dismount and run over obstacles, carrying their bikes
Dirt Jumping: Trails where you hit lumps of dirt to get airborne
Free-riding: doing things in a non-competitive way
Four Cross (4X): four racers ride downhill over a short course with big jumps and bermed corners
Hardtail: a bike with no rear suspension
IMBA: Internation Mountain Bicycling Association – an organisation dedicated to the building and protection of mountain bike trails.
MTB: moun-tain-bike
Single-track: narrow trail, big enough for one rider, often through woodland
Street Riding: Riding steps, walls, banks, skate parks and the like in an urban environment
Trials: Very skilled riding over obstacles. Usually slow-speed and very precise
