Serious about speed on your road or triathlon bike? Upgrading to carbon fiber aero bars (also called TT or tri-bars) can make a big difference. These bars are made from T700 carbon fiber, which makes them super light – around 165 to 180 grams depending on width – and strong. They come in several widths: 380mm, 400mm, 420mm, 440mm, and 460mm, so you can pick what fits your shoulders and riding style. The clamp diameter is 31.8mm, so you'll need a stem that size (don't try to force it into a smaller stem!). The flat, aerodynamic design is more ergonomic and slices through the wind better than regular bars. A nice feature is the internal cable routing – there are holes underneath so you can run your brake cables inside the bars for a super clean, pro-looking setup. Just remember, these are for road or time-trial use on smooth pavement; they're not meant for mountain biking or rough terrain. Installation requires a torque wrench – tighten the bolts to the recommended 4Nm to avoid damaging the carbon. A great upgrade for riders looking to go faster and get into a more aggressive, efficient position.