Bike handlebars come in many configurations - drop bars for road bikes, time trial handlebars for triathlon, flat bars for mountain biking, and so many more. It used to be that al handlebars were made from some grade of aluminum, say 7000 series Reynolds high grade aluminum. That was then, this is now. For road biking, it's common now to find carbon handlebars on pro level bikes as well as recreational cyclists' bikes. So let's focus on road bike handlebars. Generally, these handlebars come in widths from 38cm to 46cm. Most road bikes will be outfitted with 42cm width handlebars, which is more or less the standard size. Taller riders - or more to the point, riders with broader shoulders - will require 44cm or even 46cm wide handlebars. While shorter riders, those with more narrow shoulders, will often call for 40cm or possibly as small as 38cm wide handlebars. The center part of the bicycle handlebars is sized 25.4mm, where you clamp a stem onto the handlebars. That's the old ISO standard, at least - now, it seems that 26.0mm is seen more often. Make sure you get the right size handlebar for your bike. You'll know if you need oversize handlebars, which are sized at 31.8mm at the clamp, since it's noticably bigger at first sight. For drop handlebars, the curve and design of the bends is important for comfort. Handlebars are often called ergo or anatomic or anatomical to describe that they have been sculpted so as to give the best and most comfortable hand positioning while riding. As your hands pass over the bike handlebar bends, you'll know what feels right to you. A shallow drop bar may have a compact design, which is for improved reach and fit when paired with bar-mounted integrated shift/brake levers. A light, strong, and affordable handlebar manufactured with a leading edge composite material will allow the bar to reach high strength standards while still registering an impressively low weight. The Easton EC90 Carbon Handlebar is one example. Just like in table tennis, where there are flat, flared, and tapered handles, the feel that you like best is up to you when you choose your bike handlebars. As for flat bars, they are sized the same for mountain bikes as for road bikes, at 26.0mm most commonly. You won't find carbon used so much for mountain bike handlebars due to the need for greater impact strength. We have bike handlebars - Profile, Easton, TTT, Ritchey and more - at great savings.