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Choose by task
Free bike fit tools
Start with the question you can answer today. Measure your body, compare frames or cockpit parts, transfer a measured position, prepare a mechanic work order, close a crank or cleat trial after riding, or use the camera while you pedal. Every tool runs in your browser, shows where its numbers come from and tells you where the result stops.
- Active tools
- 19
- Video upload
- None
- Account
- Not needed
One connected workflow
Every result has a clear next step.
- 01
Build
Baseline ranges
- 02
Measure
Movement + quality
- 03
Compare
Signed coordinates
- 04
Adjust
One reversible trial
Not sure where to begin?
Build the complete baseline first. It connects your dimensions to the guided camera and re-check flow.
Find your starting point
Pick the result you need
The cards are organised by outcome, not by cycling jargon. A tool can appear in one primary group even when its result feeds another step. Use one change at a time and keep the original setup marked.
Three common journeys
Start with a complete answer
Baseline your position, observe movement, or compare frames on one shared coordinate system.
Baseline2–4 min
Complete bike fit calculator
Use height, inseam, goals and mobility to build cited starting ranges for the whole bike.
You leave with
A connected Fit Plan for saddle, cockpit, crank and camera verification.
Measurement3–5 min
Live camera angle check
Measure knee, hip, elbow and trunk movement in the browser while you pedal.
You leave with
On-device angles with quality and confidence signals; no video upload.
Comparison2 min
Bike geometry comparator
Put two frames on the same stack/reach coordinate system and see the signed differences.
You leave with
A factual frame delta without a fabricated fit score or body-shape guess.
Full workbench
All tools, organised by workflow
01 · Your measurements
Build a baseline
Start with body measurements and turn them into transparent reference ranges.
Baseline2–4 min
Complete bike fit calculator
Use height, inseam, goals and mobility to build cited starting ranges for the whole bike.
You leave with
A connected Fit Plan for saddle, cockpit, crank and camera verification.
Baseline2 min
Saddle height calculator
Compare LeMond, Hamley and knee-angle methods instead of trusting one magic formula.
You leave with
A saddle-height starting range plus the angle to verify on your bike.
02 · Your movement
Measure what happens
Use your phone camera to check movement on the bike without uploading video.
Measurement3–5 min
Live camera angle check
Measure knee, hip, elbow and trunk movement in the browser while you pedal.
You leave with
On-device angles with quality and confidence signals; no video upload.
Measurement2 min after two fitsNew
Cross-session camera comparison
Compare two confirmed dates only when the same bike setup and camera protocol are frozen for both.
You leave with
Neutral four-metric movement deltas separated from both conditions' combined observed noise.
Measurement3 min
Interactive fit demo
Walk through the real analysis, repeatability, suggestion and re-check flow with synthetic data.
You leave with
A safe preview of the complete workflow without camera permission.
03 · Your equipment
Compare equipment
Translate component or frame differences into coordinates you can reason about.
Comparison2 min
Bike geometry comparator
Put two frames on the same stack/reach coordinate system and see the signed differences.
You leave with
A factual frame delta without a fabricated fit score or body-shape guess.
Comparison3–5 min
Cockpit reach and drop calculator
Compare stem, spacer and handlebar combinations as signed horizontal and vertical coordinates.
You leave with
Exact bar-clamp and nominal hood deltas without a fabricated fit verdict.
Comparison8–12 min + ridesUpdated
Bike-linked crank swap assistant
Compare two crank lengths, then freeze the result against one bike and carry it through mechanic installation and a measured ride re-check.
You leave with
Exact crank and saddle targets, a reversible work order, repeated final measurements and a keep, revert or stop history event.
Comparison5–10 minUpdated
My bikes and adjustment history
Capture repeatable coordinates and exact component identities, then group every adjustment and follow-up by bike.
You leave with
A private bike passport with measurements, hardware sources, history and portable setup records.
Comparison2 min
Printable bike setup card
Turn one local bike profile into a reference-rich print sheet, CSV or portable JSON record.
You leave with
A workshop-ready setup snapshot with sign conventions, timestamps and exact measurement references.
Comparison6–10 min
Bike setup transfer planner
Compare two local bike passports across contact coordinates, saddle and hood details, component context and declared references.
You leave with
A staged source-to-target plan plus a measured target-bike re-check, never a fit score.
04 · Your next trial
Plan a reversible change
Make one controlled change, keep the original position marked, then re-check.
Adjustment4–8 minNew
Bike fit mechanic work order
Turn frozen local adjustment plans and exact component references into one print-ready workshop hand-off.
You leave with
Selected targets, reversal baselines, model-specific source checks and blank installation/re-measurement fields.
Adjustment5–8 min
Sit-bone saddle width assistant
Use two real sit-bone impressions and a repeatability check—never height or body type.
You leave with
A convention-labelled starting range or a clear request to measure again.
Adjustment4–6 min
Reversible cleat setup assistant
Record the starting coordinate, change one cleat axis by a small amount and re-check after riding.
You leave with
An exact reversible trial plus a keep, revert or stop decision after 2–3 rides.
Adjustment4–6 min
Saddle fore–aft change assistant
Turn a measured setback into one small forward or backward trial while preserving the baseline.
You leave with
An exact target coordinate plus a reversible ride re-check linked to one bike.
Adjustment4–6 min
Saddle tilt change assistant
Repeat a real saddle-angle reading, plan one small reversible nose-up or nose-down trial and re-check it.
You leave with
An exact angle target and bike-linked keep, revert or stop decision without an invented ideal.
Adjustment5–8 min
Hood position change assistant
Repeat one hood angle or height baseline, choose one small signed change and verify control security and function.
You leave with
An exact reversible hood target with a bike-linked measured ride re-check or safety stop.
Adjustment8–12 minNew
Stem and spacer change assistant
Freeze the current cockpit, model one spacer move or mechanic-installed stem change, then verify the installed coordinates.
You leave with
A reversible hardware plan, exact installation gates and a repeated reach/drop re-check linked to one bike.
Adjustment5–8 min
Handlebar width and controls assistant
Repeat a real width measurement and compare left/right lever reach from the same reference.
You leave with
Observed width and lever-symmetry deltas without an invented ideal or click count.
How the tools connect
- 1Build a baseline. The full calculator creates ranges and a Fit Plan; focused tools answer one narrower equipment question.
- 2Measure movement. The camera checks angles and recording quality on your own bike, then asks for an independent second take before hardware advice unlocks.
- 3Change one thing. Mark the starting position, make a small reversible adjustment and re-check the same condition before drawing a conclusion.
Private by construction
Calculator inputs, bike profiles, comparison values, fit sessions, pose landmarks and journals stay on this device. Camera processing runs on-device; OpenBikeFit does not upload your fit or video and does not require an account. Only feedback you deliberately submit leaves the browser.
Read the exact storage inventory in the device-storage policy, inspect the evidence and limitations, or review the privacy notice.