He was forced to drop out of the Tour de France in July because of a wrist injury but successfully defended his title in the Vattenfall Cyclassics one-day race in Germany on 15 August.
The average cycling road race for disabled athletes is a one-day event stretching 50 miles, while able-bodied races can last five days or more, he said.
These are usually one day affairs and are typically based on a running race of 3-12 miles, but those miles are fraught with hazards not found on any normal marathon or half-marathon course, from mud pits to vertical walls, fiery flame barriers to electric shocks, ice plunges to crawls under barbwire.