Downhill mountain biking
Videos
Downhill mountain biking (DH) is a style of mountain biking practiced on steep, rough terrain that often features jumps, drops, rock gardens and other obstacles. Jumps can be up to and including 12 meters, and drops can be greater than 3 meters.
Australian rider Jared Rando takes the A line at the 2009 UCI World Mountain Bike Championships in Canberra, Australia.
American Luke Strobel.
Indian DH rider Piyush Chavan during 1st Himalayan Downhill Mountain mike Trophy held at Himalayan Mountain Bike Festival.
Part of the Sarajevo urban downhill downtown race track.
Bicycle brake
Videos
A bicycle brake reduces the speed of a bicycle or prevents the wheels from moving. The two main types are: rim brakes and disc brakes. Drum brakes are less common on bicycles.
Spoon brake variation at the Batavus Museum in Heerenveen, Netherlands
Spoon brake on front wheel
Improvised spoon brake on a Chinese cargo tricycle