Rear wheels position 101 - Tips and tricks, Motion Composites
Aaron "Wheelz" Fotheringham: Extreme Wheelchair Athlete - Guinness World Records - YouTube
Aaron Fotheringham: Longest wheelchair ramp jump | Guinness World Records
WCMX (sport) - Wikipedia
The BMX-inspired HXC sport wheelchair
Aaron "Wheelz" Fotheringham: Extreme Wheelchair Athlete - Guinness World Records | Gravity-defying wheelchair stunts with fearless X Games champion Aaron Fotheringham AKA "Wheelz" (USA) | By Guinness World Records | - My
Watch a Man Go Wild in His Wheelchair on Skateboard Ramps - Sports Illustrated