;
Travis Pastrana :Title:
"Pro action sports athlete" :Pastrana is the Ringleader of the Nitro Circus Crew, is a pro
FMX rider, rallycar driver, and
NASCAR driver, and is usually the first to attempt any stunt involving dirt bikes or BMX bikes. ;
Andy Bell :Title:
"Washed-up motorcycle rider" :Former
FMX rider. Bell holds a rivalry with Pastrana involving
Big Wheel tricycles stemming from the first episode of the series. ;
Jolene Van Vugt :Title:
"Pro motocross racer" :Canadian Female Motocross Champion. She joins Pastrana in many stunts involving dirt bikes. Van Vugt took on more of a cheerleading role in the second season after breaking her arm and can be seen wearing a pink cast throughout the season. ;Jim DeChamp :Title:
"Pro mountain biker" :Pro mountain bike downhill racer and freestyle rider. He has been friends with Pastrana since childhood. They collaborate on many stunts together on the show. Became the first person to land a front-flip on a motorbike to dirt, as seen in the 7th episode of the first season. ;Erik Roner :Title: "
Pro skier/
base jumper" :Pro extreme skier and base jumper. Roner is usually the first to attempt any stunt involving snow. He died in 2015 caused by a skydiving accident. ;Tommy Passemante :Title:
"Construction Worker" :Known by his nickname "Street Bike Tommy", given for a failed stunt in which he attempted to jump his
Suzuki GSX-R motorcycle into the foam pit but overshot, breaking both his legs. He functions as the comic relief member of the crew, and is commonly employed for stunts that are the most dangerous and require the least amount of talent, known as "zero skill stunts". Although some rumored that Tommy had passed in a failed base jumping accident, he indeed did not and hosted a show with the cast of impractical jokers called
The Explosion Show. ;Greg Powell :Title:
"Travis' cousin" :Pastrana's Cousin. Going by the nickname "Special Greg", Powell is the all-around member of the team, and generally attempts any stunt on the show. He was the first person to land a "Special Flip" on a BMX bike. He was a wide receiver on the University of Maryland football team from 2003–06 and is currently an over-the-wall crewman for Pastrana in NASCAR. ==Episodes==