If you scan the transition area of beginner-friendly triathlons, you can find a wide range of brands and bicycle types. For your first triathlon, any bicycle that you have access to will work fine. After the triathlon bug bites, you may want to consider a new bicycle. The question is—what type of bicycle is right for you?
You can find the answer in the article from Gale Bernhardt, the USA Triathlon team coach at the 2003 Pan American Games and 2004 Athens Olympics. The article also solves the following problems:
* What are the Differences Between Bicycles?
* Why is Frame Geometry Important?
* Should I Buy a Road Bike or a Triathlon Bike?
Here is the article link: http://www.active.com/triathlon/articles/do-you-need-a-triathlon-bike.