Your bike fit measured, not guessed
Pedalyze checks your position against professional fit ranges in under a minute. No studio visit, no €200 session, no waiting for an appointment.
Knee stays quite bent at the bottom — saddle is likely too low.
Hip is very open — comfortable, but costs aerodynamics.
Arms are tucked under the torso — reach may be too short.
Stop guessing. Ride further without the pain.
Pedalyze brings precision biomechanics to your home setup — at a fraction of the cost of an in-studio fit.
No stickers or markers needed
Simply upload a photo in your normal kit. AI pose estimation pinpoints your hip, knee, ankle and shoulder joints automatically in seconds.
Spot fit factors linked to discomfort
Instantly measure your exact saddle height, knee flexion and KOPS — angles commonly associated with knee pain, lower back fatigue and hand numbness.
Pro fit ranges, made simple
Compare your position against published fit ranges — knee flexion follows Holmes, Pruitt & Whalen (1994), the rest follow the KOPS and torso-angle conventions in common fitting practice. Get clear pass, warn or fail feedback on every angle, then share a link so your own fitter can review it with you.
Where the ranges come from: knee flexion of 25–35° at the bottom of the stroke comes from Holmes, Pruitt & Whalen, "Lower Extremity Overuse in Bicycling" (Clinics in Sports Medicine, 1994), which recommends 25–30° and is the most-cited number in bike fitting. KOPS is a long-standing fitting convention, not a law of biomechanics. Hip, torso, elbow and shoulder bands are our own reading of widely published road, comfort and TT fit guidance, widened for a 2D photo measurement. We are independent and are not affiliated with, or certified by, Retül, Steve Hogg, BikeFit or any other fitting system.
Pedalyze vs. in-studio bike fit
A quick screening for the common issues — saddle height, reach, bar drop. Not a replacement for a certified fitter if you're dealing with pain, injury or asymmetries.
| In-studio fit | PedalyzeBest value | |
|---|---|---|
| Cost | €200 per session | 1 free report every 7 days, then €29 one-time |
| Time required | 2–3 hours, plus travel and scheduling | Under 60 seconds, from your living room |
| Equipment needed | In-person studio visit and specialised rigs | Just your phone camera |
| Re-checking after gear swaps | Book and pay again for a new bike or shoes | Re-analyse any time you change gear |
| Analysis method | In-person fitter's eye and goniometer | AI pose estimation checked against published fit ranges (see source note above) |
| Post-fit check | Requires booking a follow-up consultation | Instant re-check after adjusting your saddle or stem |
Fit-critical angles, measured in seconds — no appointment needed.
Check my fit now — it's freeSee a real report
This is an actual Pedalyze analysis — the same photos, angles and tips you'll get for your own fit.
- Knee flexion (6 o'clock)25.8°In range
Target 25–35°
Measured knee angle: 154°. Flexion = 180° − 154° = 25.8°.
No adjustment needed - Hip angle115.5°Out of range
Target 45–75°
Hip is very open — an upright position. Fine for comfort, costs aerodynamics.
An overly open hip pushes your torso upright, adding frontal area and drag.
- Torso angle from horizontal51°In range
Target 40–55°
No adjustment needed - Elbow angle164.6°In range
Target 150–165°
No adjustment needed - Shoulder angle64.9°Out of range
Target 80–100°
Arms are tucked under the torso; reach may be too short.
A short reach loads the lower back and can restrict breathing.
Fit Score
Needs some work
Improves as you work through the tips below.
Analysis confidence
High·86%
- ✓Side-on image
- ⚠Camera tilt could not be verifiedPhoto: 6 o'clock, 3 o'clock
- ✓Full body in frame
- ✓Joints clearly visible
How much to trust the measured angles, based on capture quality and how clearly each joint was detected.
Tips to improve your fit
Ranked so you tackle the biggest issues first.
- 1Hip angle6 o'clock (bottom of stroke)
Hip is very open — an upright position. Fine for comfort, costs aerodynamics.
An overly open hip pushes your torso upright, adding frontal area and drag.
- 2Shoulder angle6 o'clock (bottom of stroke)
Arms are tucked under the torso; reach may be too short.
A short reach loads the lower back and can restrict breathing.
- 1KOPS offset (3 o'clock)3 o'clock (crank horizontal)
Knee sits ahead of the pedal spindle — try moving the saddle back.
Knee ahead of the spindle increases strain on the front of the knee.
Made this tweak? Upload a new photo to re-test your fit.
Upload new photoA photo is one instant. Your pedal stroke is the whole story.
Film about 10 seconds from the side. Pedalyze measures every angle through the full crank cycle, not one frozen frame.
Every angle, all the way round
Knee, hip, torso, elbow, shoulder and knee-over-spindle, measured across the whole stroke instead of a single frame.
Cadence and ankle technique
See your cadence and how your ankle moves through the stroke — things a still photo cannot show.
A fit score, and how much to trust it
One weighted score for the whole position, next to a confidence rating based on how good the clip was.
The clip never leaves your device
The analysis runs in your browser. The video is never uploaded — only the measurements, and only if you save them.
Angles across the stroke
Sample analysisFit score
82
Cadence
88 rpm
How it works
Four steps, and you can repeat the last two as often as you want.
Take two photos
Side-on, with the cranks at 6 and 3 o'clock. Follow the capture guide on screen.
Get your fit analysis
Pedalyze measures your position and shows which angles are outside the reference range.
Make an adjustment
Use the recommendations to change your saddle, bars or cleats.
Test again
Upload a new photo and see if your position improved.
When riders check their fit
Anything that moves your body or your contact points changes your position. These are the moments worth a check.
New bike day
The shop set it up by eye. Check the numbers before your first long ride.
Knee pain on long rides
Saddle height and fore/aft cause most knee complaints. Measure both in a minute.
New shoes or cleats
A different stack height moves your saddle height by millimetres you can feel.
Numb hands or a sore back
Check your reach, your bar drop and how much weight your torso angle puts on your arms.
Going lower and faster
See how far you can drop the front end before your hip angle starts to cost you power.
Setting up the indoor bike
Copy your outdoor position onto the trainer bike, and measure it instead of guessing.
Fitting a partner's bike
One photo each. No second appointment and no second fee.
After a fitting session
Confirm the changes stayed where the fitter put them, and re-check every time you adjust.
Your photos stay yours
You are sending pictures of your own body. Here is exactly what happens to them.
Video never leaves your device
The video check runs fully in your browser. The clip is never uploaded — only the measurements, and only when you save.
Photos are stored for you, not sold
Photos go to private storage tied to your account so you can compare over time. We never sell them and never share them for advertising.
Delete them whenever you want
Remove any analysis from your history at any time. Run one without an account and the photo is deleted automatically after 7 days.
Free calculators, no account needed
Quick answers for the numbers that come up when you set a bike up. They give you numbers — Pedalyze gives you your position.
One price. No subscription.
Your first report is free, and you get another one every 7 days. Pay once only when you want to keep adjusting.
Free
To try Pedalyze. No credit card.
€0 forever
- 1 free report every 7 days
- See which joint angles are in range, and which are not
- Fit score and recommendations
- All fit profiles (road, endurance, TT)
Fit Session
To dial in your position, once.
€29 one-time
30 days of full access
- Unlimited analyses for 30 days
- Unlimited re-checks after each adjustment
- Fit score and recommendations
- All fit profiles (road, endurance, TT)
- Printable fit report
The Fit Session pass is a one-time payment. It does not renew, and there is nothing to cancel.
Questions riders ask first
How accurate is it compared to a professional bike fit?
Pedalyze checks your position against the published ranges described in "Where do your target ranges come from?" below, and it catches the common issues — saddle height, reach, bar drop. It is a data-driven first screening, not a replacement for a certified fitter if you have pain, injuries or asymmetries. One known approximation: the KOPS check uses your ankle as a pedal-spindle proxy, so it reads slightly rearward of a true plumb line.
Do I need special equipment?
No. A phone camera and something to keep the bike steady — a trainer, or a friend taking the photo — is all you need. You ride in your normal kit; no markers or stickers.
Why was my photo rejected?
Pedalyze checks every photo before it measures anything. If the camera is off-axis, tilted more than about 4°, the rider is cropped, or joints are hard to see, the photo is rejected instead of silently measured wrong. The report tells you exactly what to fix before you retake it.
Is there a free plan?
Yes. You get 1 free fit analysis every 7 days with the full angle overlay and pass/warn/fail results — no credit card required. The €29 Fit Session pass then gives you 30 days of unlimited saved analyses, comparisons over time and PDF export.
What happens to my photos and data?
Your photos are stored securely in cloud storage tied to your account, and your analysis results are saved to your history so you can track changes over time. You can delete your analyses at any time.