And while most custom bike companies used to sell mainly frames that you then had to complete a la carte, the most expensive way to by bike components, they are now offering complete finish kits in a range of quality levels and greatly discounted prices.

FORBES: Why You Need a Custom Road Bike

Benjamin will start off with a 750m swim before he hands over to Horstmann for the 20km bike ride, Sanderson will complete the event with a 5km run.

BBC: Warriors trio set for triathlon

He said he hoped to complete the 2.4 mile swim, 112 mile bike ride and marathon in under 11 hours in October.

BBC: Herne Bay Ironman student's air ambulance fundraising

The South Bronx Greenway will eventually be an eleven-mile network of bike and pedestrian pathways, she explains, complete with storm water management and recreational systems.

CNN: Blazing a green trail through the Bronx

Kona, as it is known, is the full iron deal: a 2.4-mile swim, a 112-mile bike ride, and, just for fun, a complete marathon, 26.2 miles.

WSJ: Jason Gay: Italian for Dinner, a Triathlon for Dessert

Williams will use the station's bike to pedal 18 miles and then will strap herself to the treadmill to complete the final four miles of running.

MSN: High score assured: Astronaut doing triathlon �� from space

The KICKR Power Trainer is the world's first iPhone powered bike trainer, allowing cyclist and triathletes to set resistance, accurately measure power and complete App based workouts, all from their iPhone.

ENGADGET: Wahoo KICKR Power Trainer lets iPhone cyclists feel the simulated burn (video)