Triathlon bikes are used to accomplish fast rides on flat roads as opposed to bumpy trails and terrain. This is because the primary usage of triathlon bikes is in the competitive discipline of triathlons. Triathlon is a sport that’s made up of three stages; running, cycling, and swimming.

Biking is generally the most expensive leg of a triathlon. You’ll be faster and use less energy with a road bike, but if all you have available is a mountain bike, you can use that too. You can also rent a bike for a race. You’ll definitely need a helmet, not only for your own safety, but also most races require the use of a helmet.