If your goal is to set a new triathlon personal best, consider purchasing a time-trial bike. These midrange models mix value and performance, and are all but guaranteed to improve your bike split. They offer aerodynamic carbon-fibre frames, reliable

When it comes to triathlon kit, the bike is likely to be your biggest single purchase. Don't be surprised if your eye is drawn toward top-of-the-range time-trial bikes with exquisitely sculpted carbon frames, swooping aero bars and deep

if you're just starting triathlon. Cons Road-bike geometry is not as aggressive (or steep) as it is on a time-trial (TT) bike, which means the bike will have a more predictable riding style but not offer the efficient power delivery that can be gained

-rounder. "If you only buy one bike, then make it something you can train and commute on, and that's good for a variety of courses," says Allen. "Triathlon-specific time-trial bikes have limited use. You can always add clip-on aero bars to a road bike as you

of saddle-related pain falls into this category.) In layman's terms, this is known as a sore arse. The ischial tuberosities, or sit bones, are part of your pelvis; if you're a recreational triathlete, as opposed to, say, a pro time-trial specialist