How do I measure shoulder width?

Measure the distance between the bony points on top of each shoulder (acromion processes). This is the centre-to-centre measurement, typically 36-46 cm for adults.

Should bars exactly match shoulder width?

Traditionally yes, but many riders now prefer bars 2 cm narrower for better aerodynamics. Wider bars offer more control and breathing room.

What sizes do handlebars come in?

Drop bars come in 38, 40, 42, 44 and 46 cm (measured centre-to-centre or outside-to-outside depending on manufacturer). Check the measurement standard when comparing.

BikeCalcs

Handlebar Width Calculator — Correct Bar Width

Find the right handlebar width from your shoulder measurement.

Shoulder Width

Measured between AC joints (bony points on top of each shoulder)

Riding StyleRace = narrower for aero; gravel = wider for control and stability

Measurement MethodCheck your bar brand — Shimano/SRAM use centre-to-centre; 3T/Zipp use outside-to-outside

How We Calculate This

Handlebar Width Selection

Recommended Width = Shoulder Width + Style Adjustment

The base measurement is rounded to the nearest standard handlebar size. Racing riders often go 2cm narrower for aerodynamics, while gravel/touring riders go 2cm wider for stability.

Measurement methods

Shimano and SRAM measure centre-to-centre. Some brands (3T, Zipp) measure outside-to-outside, which reads ~2cm wider for the same bar.

Frequently Asked Questions

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Last updated: 2025-02-20

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