Handlebars
Used road handlebars come in three basic shapes: classic round (traditional bend), compact (shorter reach and drop), and ergo/anatomic (flat tops with shaped drops). Width should roughly match shoulder width, with most riders on 40-42cm bars, and drop depth and reach set the hand positions you actually get. Bar shape affects comfort more than almost any other component.
Which bar shape suits my riding?
Classic round bend, the Cinelli Giro d'Italia shape, has a deep drop and long reach — traditional racers and retro builds. Compact bars such as the Zipp Service Course and Deda Zero100 have a shorter reach of 70-80mm and a shallower drop of 120-130mm, which is more accessible if you use the drops frequently. Ergo/anatomic bars like the FSA Energy and Enve Compact have a flat section in the drops for a more natural wrist position. Bar shape is personal, so try before committing to expensive carbon, and factor in the shifters you plan to mount on them.
Are flared or aero bars worth it?
Flared bars — the 3T Superergo and Salsa Cowchipper among them — widen at the drops for stability on gravel. Aero bars with integrated cockpits are increasingly common but limit adjustability, so what you buy is close to what you have to ride. On a used purchase that cuts both ways: a good integrated cockpit is a bargain if the dimensions happen to fit you, and dead money if they don't.
What handlebar width should I buy?
Width is measured centre-to-centre at the drops, though some brands measure outside-to-outside, so check the spec. As a guide, 38cm suits narrow shoulders, 40cm is average, 42cm is broad and 44cm and above suits larger riders. Too-wide bars open the chest for breathing but slow the steering; too-narrow bars are twitchy and uncomfortable. The trend is slightly narrower for aero benefit, with many pros now running 38-40cm — if you are between sizes, go narrower for racing and wider for comfort and gravel.
Carbon or aluminium?
Carbon bars (Zipp SL-70, Enve SES AR, Deda Superzero) weigh 180-220g and damp road vibration noticeably — an upgrade riders feel immediately. Aluminium bars (Zipp Service Course, Deda RHM, Ritchey Comp) weigh 260-320g, cost less, are tougher and are perfectly functional. The damping difference is real but subtle: carbon is worth it for long rides on rough roads and less important for short races. Budget for fresh bar tape either way, since it has to come off to fit them. Avoid cheap unbranded carbon bars — quality control matters for safety-critical components.
What should I check buying used?
Inspect carbon bars under strong light for cracks, especially around the stem clamp area and the lever clamp band. Look for over-tightened stem marks, visible as compression or paint cracking on the clamping surface. Aluminium bars can develop fatigue cracks at the stem junction after years of use, so inspect carefully. Verify the clamp diameter matches your stem: 31.8mm is the modern standard, 26.0mm is the older road standard, and some brands use 25.4mm. Check the bars haven't been cut — some riders trim bar ends for narrower width, which affects structural integrity on some models.