Todd Key typically bikes more than 150 miles a week through Scottsdale, Arizona.
And he does it with just one leg.
Key lost his right leg to cancer when he was seventeen.
His right arm was left disfigured after a bad break.
He bikes using a plastic sleeve under his right hip, and an armrest for his right elbow.
It turned into a passion because once you start doing this kind of exercise, you just want more and more and more.
He's hoping to inspire other amputees to get on a bike again.