Съвсем различни неща са.
[b]Dirt Jumping[/b] is similar to BMX racing in that the rider jumps mounds of dirt. It differs in that the jumps are usually much larger and designed to loft the rider high into the air. Additionally, the goal is not to complete the course with the fastest time, but rather to perform the best tricks with the best style.
[b]Dirt Jumping [/b]is a sport where riders ride down a path which leads to one, two or a number of huge mounds of mud from which they jump in the air and perform tricks on their bikes. Dirt Jumping bikes do not have Pegs.
А какво е [b]trial[/b] можеш да прочетеш тук:
http://trials.hit.bg/v2/trial.htm