Frame size · shortlist smarter
Which size fits you?
Bike category
Your measurements
Example measurements — adjust or confirm both measurements to use your own result.
Measure standing tall without shoes.
Barefoot, hold a book firmly between your legs against a wall.
- Example shortlist
- 56–57cm
- 48–50cm
- 51–53cm
- 54–55cm
- 56–57shortlistcm
- 58–59cm
- 60–62cm
Your proportions
Inseam / height 0.467
Measurement context only. This ratio does not select a larger or smaller frame.
- Saddle-height baseline
- 742mm
Size is the first filter
Stack, reach and cockpit determine whether a bike really fits. Compare these measurements with the manufacturer's geometry.
Free account
Make this advice more personal
Check this size against the geometry of real bikes in our database.
- Your details stay saved. No need to enter them again, even in other calculators.
- A narrower range. Use your own measurements to compare the geometry of bikes you are considering.
- Your next step is ready. Use your measurements in the bike-fit calculator.
These details go with you to your account
Nothing entered yet. Move a slider or choose an option; only what you enter goes with you.
Save my details · free accountYour entered values go with you; there is no need to enter them again. No account? Your result above stays available.
Your entered details are only remembered for this browser session.
Example shortlist
56–57 cm
The short answer
Your height and bike type give an approximate frame size to start with. Then compare the stack and reach of actual models: the same size label can mean different dimensions across brands.
How we calculate
The calculator chooses a size range from a table using height and bike type. Your inseam is used separately for a quick saddle-height estimate; it does not change this sizing table.
What this cannot tell you
This range is not a purchase recommendation for a particular frame. The calculator does not check the geometry, standover height or adjustment room of a specific model here.
Worked example
An example with fixed inputs. Use the calculator for your own details.
Input
- Height
- 178 cm
- Measured inseam
- 84.5 cm
- Bike type
- Road bike
Calculated result
- Approximate frame size
- 56-57 cm
- Quick saddle-height estimate
- 746 mm
Common mistakes
- Relying only on the size label.
- Assuming your inseam determines frame size in this calculator.
- Leaving a comfortable existing frame out of your comparison.
What makes this tool trustworthy
Good at filtering options, honest about what is still missing
The value is in ruling out wrong sizes faster, not in oversimplifying the full fit problem.
Shortlist smarter
This tool helps you remove implausible sizes before you spend time on detailed comparisons.
Based on real proportions
Height alone is too rough. Inseam makes the estimate more usable and more credible.
Not a replacement for geometry comparison
A frame-size label is never the whole story. That is why stack, reach, and cockpit checks still come next.
What's next?
Refine the result in your account
Create a free account to build your rider profile, start a personalized fit, and track future adjustments.
FAQ
Short answers about frame size and what this tool does and does not do.
Can a frame-size calculator replace a complete bike fit?
No. Frame size is only one part of the fit. Reach, drop, and contact points still determine whether the bike works well for you.
Why does inseam matter for frame size?
It strongly affects saddle height and overall proportions, which influence which size ranges are realistic.
Explore more
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