Free Online Bike Fitting
AI-powered bike fit analysis via webcam, video or photo. Detect causes of cycling pain (knee, back, neck) and get saddle height, setback and handlebar recommendations.
Start free bike fit How it works
11,908 analyses completed 4.8/5 (2068 reviews)
Cycling pain? You're not alone
Knee pain cycling
Cause #1: incorrect saddle height. Our bike fit analysis detects this issue.
Back pain cycling
Often caused by wrong handlebar position or saddle setback.
Hand numbness
Too much weight on the front? Your back angle and stem length need checking.
In 80% of cases, it's a bike fit problem.
3 steps, 5 minutes
No appointment or special equipment needed
01
Questionnaire
Tell us about your practice: road, MTB, gravel? Any pain, your goals.
02
Capture
Live webcam, video upload, or a simple photo — choose your method. Our AI analyzes your angles in seconds.
03
Adjustments
Saddle height, setback, handlebars... Get detailed recommendations with numbers.
How to capture properly
Follow these tips for accurate analysis
1
Side view
Position the camera perpendicular to your bike at saddle height. The right side (chainring visible) works best.
2
Good lighting
Use natural light or uniform lighting. Avoid backlighting and harsh shadows.
3
Fitted clothing
Wear close-fitting clothes (cycling shorts, jersey) for accurate joint detection.
4
Proper distance
The entire bike and cyclist should be visible with some margin around.
5
Pedal position
For analysis, place the pedal at bottom dead center (6 o'clock). That's where knee extension is measured.
6
Stable support
Use a turbo trainer if possible. Otherwise, lean against a wall or have someone help.
The angles that matter
Our analysis measures the 4 key angles for optimal position. Every degree counts for your comfort and power.
Knee extension
140-150°
At bottom of pedal stroke
Hip angle
55-70°
Pelvis opening
Back angle
35-50°
Depends on your practice
Arm angle
150-165°
Slightly bent
Scientific methodology
Our angle ranges are based on scientific literature and professional bike fitting practices
Knee extension (140-150°)
Measured at bottom dead center, this angle determines optimal saddle height. The Holmes method recommends 25-35° flexion from full extension.
Too low = knee pain, too high = pelvis rocking
Hip angle (55-70°)
The minimum opening between thigh and torso at top dead center. This angle affects comfort and power output.
Too closed = iliac artery compression, breathing limitations
Back inclination (35-50°)
The angle between back and horizontal varies by riding style: 40-50° for endurance, 30-45° for road performance.
Lower angles are more aero but more demanding
Arm angle (150-165°)
Slightly bent arms (~20° flexion) absorb vibrations and keep shoulders relaxed.
Straight arms = neck tension, hand numbness
References
- Holmes JC, Pruitt AL, Whalen NJ. (1994). Lower extremity overuse in bicycling. Clinics in Sports Medicine.
- Millour G, et al. (2020). Comparison of static and dynamic methods based on knee kinematics.
- Bini RR, et al. (2011). Effects of saddle height on pedal force effectiveness.
- Ferrer-Roca V, et al. (2014). Saddle height effects on pedal forces and kinematics.
These are general reference values. Professional analysis is recommended for complex cases.
For all cyclists
Road, MTB, Gravel, Triathlon, City, Indoor trainer
Why is it free?
No reason to pay for a bike fit in 2026
AI + Human expertise
Our AI was developed and supervised by cycling enthusiasts and biomechanics experts. Angle ranges are based on scientific literature.
Zero infrastructure costs
Analysis runs 100% on your device. With no servers to maintain, we have no hosting costs, allowing us to offer professional-grade analysis for free.
Personalized questionnaire
Before video analysis, our detailed questionnaire (riding style, pain points, goals, body type) tailors recommendations to YOUR profile, not generic values.
Same analysis, same precision, $0. Technology makes bike fitting accessible to everyone.
Frequently asked questions
Is it really free?
Yes, 100% free. No account to create, no credit card. Your data stays on your device.
What do I need?
A computer or phone, and your bike. Use live webcam, upload a video, or take a simple photo from the side (right side). Ideally on an indoor trainer.
Is it as reliable as a pro bikefitter?
It's an excellent first analysis. For complex issues or persistent pain, a professional is still recommended. MyBikeFitting gives you a solid foundation.
What type of bike does it work with?
Road, MTB, gravel, city, triathlon... The analysis works with all bike types.
Why I created MyBikeFitting
After months of knee pain on every ride, I searched for solutions. Appointments with bikefitters were expensive and hard to get.
I spent hours on YouTube learning how to adjust my saddle. Trial, error, trial... Until I found the right position.
Today, this experience is automated. AI does in 5 minutes what took me weeks.
Elouan
Cyclist & Creator of MyBikeFitting
Ready for your next ride?
5 minutes to optimize your position.
Hours of extra comfort on the bike.