Free bike fit · your starting point
Build your first fit profile
Your body
Stand upright without shoes.
Measure barefoot from the floor to the top of a book held firmly between your legs.
These are example measurements. Choose measured or estimated before using the result as your own.
Your riding style
Bike category
Riding goal
Choose the level you can hold comfortably, without forcing the stretch.
Think about how steadily you can hold your riding posture.
Input confidence
Example resultExample result: 742 mm
Your position, live
Illustration, not to scale
- Saddle height
- 742mm
From bottom-bracket centre to saddle top, along the seat tube.
Safe starting band: 722–764 mm
- Saddle-to-bar reach
- 594mm
Horizontal distance from saddle nose to handlebar centre.
Reach range: 470–630 mm
- Saddle-to-bar drop
- 74mm
- Frame-size shortlist
- 56-57cm
Adjust in this order
- Start with saddle heightMake small changes and test them over a few rides.
- Then check setback: 54 mmMeasure the saddle nose behind the bottom bracket.
- Check handlebar height and reach lastThe full account flow also covers cleats and your current setup.
- Stack target
- 638mm
- Frame reach target
- 540mm
Starting targets; compare stack, reach and cockpit on the actual bicycle.
A starting point, not a final fit
Cleat stack, saddle shape and asymmetry are not included. Persistent pain needs an in-person assessment.
Free account
Make this advice more personal
Your reach is currently estimated from your height. With your arm and torso lengths, we calculate it.
- Your details stay saved. No need to enter them again, even in other calculators.
- A narrower range. Your arm and torso lengths let us use your measurements instead of averages.
- Your next step is ready. Use the same details for your saddle height and crank length.
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 result
742 mm
The short answer
Your height, inseam and riding goal give an initial direction for your riding position. Use the result to compare your current setup and test one change at a time.
How we calculate
The calculator converts your measurements to millimetres. Bike type, riding goal, flexibility and core stability influence the targets for saddle height, saddle-to-bar distance and drop.
What this cannot tell you
This is a calculation model, not an assessment of how you move on the bike. Additional body measurements and your frame geometry are absent from this example. Default estimates fill those gaps.
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
- Riding goal
- Balance of comfort and performance
- Flexibility (input out of 5)
- 3
- Core stability (input out of 5)
- 3
- Additional body measurements and frame geometry
- Not supplied; the calculator uses its default estimates
Calculated result
- Saddle height from the bottom bracket centre
- 746 mm
- Starting saddle-height range
- 727–769 mm
- Saddle-to-bar distance
- 587 mm
- Saddle-to-bar height difference
- 75 mm
- Crank length
- 172.5 mm
Common mistakes
- Confusing inseam with trouser length.
- Confusing frame reach with saddle-to-bar distance.
- Moving the saddle and bars together, making it hard to tell which change helps.
Why riders start here
Reliable enough to choose the right next step
The public calculator is built to give you direction, not to sell false certainty.
Clear starting point, no fake precision
You immediately see a sensible direction for saddle height, reach, and drop, without pretending a public intake replaces a full fit.
Same fit engine as the product
This calculator uses the same fit logic as the dashboard. The public version simply keeps the output to a safe first step.
Built for the next decision
Use the result to assess your current setup, shortlist a new bike, or decide whether you need deeper fit work.
FAQ
Short answers to the most common questions.
How accurate is this free bike-fit calculator?
It provides a useful first-pass estimate based on your measurements and riding goal. Inside the dashboard you can refine it further with more context around your current setup.
Which value should I adjust first?
Start with saddle height and overall cockpit balance. Then refine reach, drop, and frame targets step by step.
Explore more
Related tools and guides
Keep going with related guides and calculators that build on what you just learned.