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How to choose road and gravel handlebars

Width, drop, reach, and flare — a hedged guide to the main handlebar dimensions and how they affect your fit.

2 min readUpdated 9 May 2026
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Handlebars are one of the most fit-relevant parts of your bike. Small changes in width, drop, or reach noticeably change your position and comfort.

This guide is a general overview. Always confirm exact dimensions against the manufacturer's geometry sheet before buying.

The main dimensions

  • Width — usually measured centre-to-centre at the drops or hoods. Should approximately match your shoulder width, though preference varies.
  • Drop — vertical distance from the top of the bar to the bottom of the drops. Shallower drops are friendlier for less flexible riders.
  • Reach — horizontal distance from the centre of the bar to the deepest point of the curve. Affects how far the hoods sit.
  • Flare (gravel) — drops angled outwards. Gives a wider, more secure grip when descending.

Width choice

RidingTendency
Aero road / racingNarrower (often 38–40cm)
Endurance roadMatch shoulder width
Gravel / adventureWider, often with flare
Touring / bikepackingWider with flare for stability

Reach and drop

  • Short reach + shallow drop — newer riders, less flexible riders, comfort focus.
  • Long reach + deep drop — racers, riders who want a stretched position in the drops.

Compatibility

  • Bar diameter — most modern bars are 31.8mm at the clamp. Older bikes may use 26mm. Stem must match.
  • Material — carbon is lighter and more vibration-damping; alloy is more robust and cheaper.
  • Internal cable routing — important if your stem/headset routes cables internally.

Common mistakes

  • Going too narrow because of trends — comfort and breathing matter.
  • Ignoring the brake lever position that the new bar will dictate.
  • Forgetting cable length. A wider bar may need longer cables/hoses.

Browse our handlebar range or chat with us for a fit-led recommendation.

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