Road Bike Sizing: Size Chart, Stack and Reach Explained

Updated 14 October 2026 · Written by Stas Bashylov, Ihor Twin

A size chart is the fastest way to narrow down which road frame to look at. It is not the final word: two "56 cm" frames from different brands can fit very differently. Use the chart to find your likely size, then compare stack and reach between the bikes you are considering.

Road bike size chart by height and inseam

Find the row that matches both your height and your cycling inseam. If they point to different rows, give more weight to inseam — it is closer to what the frame actually has to fit.

Road bike frame sizes (general industry ranges; source: thebikeshoppe.com bike size guide)
Frame size	Rider height	Inseam
47 cm	152–158 cm	71–75 cm
50 cm	158–163 cm	74–77 cm
52 cm	163–168 cm	76–79 cm
54 cm	168–174 cm	78–82 cm
56 cm	174–180 cm	81–85 cm
58 cm	180–185 cm	84–87 cm
60 cm	185–190 cm	86–90 cm
62 cm	190–195 cm	89–92 cm

Charts for gravel, mountain, hybrid and kids’ bikes are in the bike size guide, which also highlights the rows matching your measurements.

Between two sizes?

It depends on the geometry of the specific bikes and on your own fit, so compare stack and reach for both sizes:

Smaller size: the handlebars usually sit lower and closer, with room to adjust using a longer stem or more spacers.
Larger size: the handlebars usually sit higher and further away.

A fit can be tuned with stem length, spacers and saddle position, but only within limits. Getting the frame roughly right first makes everything else easier. If you can, test-ride both sizes or ask a bike fitter.

Why stack and reach matter more than the size label

Stack is the vertical distance from the bottom bracket centre to the top centre of the head tube; reach is the horizontal distance between the same two points. Together they describe where the front of the bike is, independent of how a brand labels its sizes.

The bike fit calculator estimates a frame reach range for road and gravel bikes from your inseam, alongside a frame size suggestion — useful for checking candidate frames against their geometry charts.

Measure before you use the chart

Charts are only as good as your numbers. Measure your height barefoot and your inseam with the book-against-the-wall method — see how to measure your inseam. If you are also choosing between a road and a mountain bike, the road vs. mountain bike fit guide explains how sizing differs.

Bike shops can offer the same size and fit check to their customers: see FitInspector for bike shops.

Frequently asked questions

What size road bike do I need for my height?

As a general guide, riders of 168–174 cm often fit a 54 cm road frame, 174–180 cm a 56 cm, and 180–185 cm a 58 cm. Check your inseam too, and compare stack and reach on the specific bike, because brands size their frames differently.

Should I size up or down between two road bike sizes?

It depends on the geometry of the bikes and on your fit, so compare stack and reach for both sizes. A smaller size usually puts the handlebars lower and closer, a larger one higher and further away. Stem and spacers can only compensate within limits; if you can, test-ride both.

Sources

The Bike Shoppe, bike size guide (general size ranges used in the table).
Empfield D. Coordinate Predictors Versus Body Angles in Road Bike Fit. Slowtwitch; 2012. (Empfield introduced the stack and reach terms; this article applies them to road fit.)