How do I measure my shoulder width?

Measure the distance between the bony tips of each acromion (the protruding bone on top of each shoulder). Use a tape measure across your back or have someone help. This measurement in centimetres is your starting point for handlebar width.

Should handlebar width match shoulder width exactly?

For road drop bars, matching shoulder width (centre-to-centre) or going 1-2cm narrower is typical, with gravel bars often 2cm wider. Mountain bike flat bars are far wider than your shoulders for leverage and control — driven by discipline rather than a fixed add-on: roughly 700-740mm for XC, 740-780mm for trail and 780-800mm for enduro and downhill, then fine-tuned to your shoulders and cut down.

Does handlebar width affect comfort?

Yes, significantly. Bars that are too narrow restrict breathing and cause shoulder tension. Bars that are too wide cause fatigue in the arms and shoulders. The correct width allows your arms to hang naturally from relaxed shoulders.

Handlebar Width Calculator — Free Fitting Tool

Handlebar Width Calculator

Calculate ideal handlebar width from shoulder measurement and riding style.

Shoulder Width

Bony tip to bony tip (acromion to acromion)

Riding StylePrimary riding discipline

Handlebar TypeType of handlebars on your bike

Upper Body FlexibilityAffects how narrow you can comfortably go

How We Calculate This

Starting from your shoulder width, adjustments are made for riding style (road, gravel, MTB), bar type (drop, flat, riser) and flexibility. Drop and aero bars are quoted in centimetres (centre-to-centre at the hoods, the road convention); flat and riser bars are quoted in millimetres and run wider than your shoulders for leverage.

The result is rounded to the nearest standard size — road bars step in 2cm increments from 36cm to 46cm, while flat/riser bars are sold from 680mm to 820mm. Choosing outside-to-outside adds the ≈2cm (≈20mm) offset versus centre-to-centre. For flat bars, start wider and cut down in 5mm increments on each side until comfortable.

Frequently Asked Questions

Last updated: March 2026

All calculations are estimates. Always verify results and consult a professional bike fitter where appropriate.