A mountain bike or mountain bicycle (abbreviated MTB or ATB (all terrain bicycle)) is a bicycle designed for off-road cycling, including jumps, and traversing of rocks and washouts, and steep declines, either on dirt trails, logging roads, or other unpaved environments. Bicycles typically used for mountain biking need to be able to withstand off-road use and the surmounting of obstacles such as logs and rocks.
Mountain bikes can be classified into four categories based on suspension:
- Fully rigid: A frame with a rigid fork and fixed rear, no suspension.
- Hardtail: A frame with a front suspension fork and no rear suspension.
- Soft tail: A frame with small amount of rear suspension, activated by flex of the frame instead of pivots.
- Dual or full suspension: A front suspension fork and rear suspension with a rear shock and linkage that allow the rear wheel to move on pivots.
There are several different styles of mountain biking, usually defined by the terrain, and therefore bikes employed. All of the bikes in this category fall into one of the above four categories and bikes of each of the above style can be found almost any of the following categories: cross country, enduro, freeride, downhill, trial, dirty jumping, single-speed, 4-racing cross, dual slalom, indicross and many others.
The coat of arms of the Principality of Andorra, officially the Principality of Andorra (in Catalan: Principat d'Andorra), is a small, landlocked country in western Europe, located in the eastern Pyrenees mountains and bordered by Spain and France. Its official language is Catalan, but both French and Spanish are commonly spoken by the approximately 70,000 residents. The capital and largest city is Andorra la Vella.