A saddle a few millimetres too low or too high changes the angle your knee works at on every pedal stroke, thousands of times a ride. 2BikeFit measures that angle from one phone video and tells you which way to move the saddle.
Free scan. You'll need your bike on a trainer or rollers, your phone, and about ten minutes.
Bike fitters read knee pain by where it sits. These are the usual fit causes, and each one is something 2BikeFit measures.
Front of the knee
Saddle too low or too far forward
What we check: Knee angle at the bottom and top of the stroke, and where your knee sits over the pedal.
Back of the knee
Saddle too high or too far back
What we check: Knee extension at the bottom of the stroke, so you can see if you are overreaching for the pedal.
Inside or outside
Cleat rotation or position
What we check: A guided cleat step that sets fore/aft and rotation from landmarks on your own foot.
The knee angle at the bottom of the pedal stroke is the number that tells you whether your saddle height fits. This rider started below the target range, raised the saddle, and recorded again. Both results below are straight from the analysis.
Your knee angle at the bottom of the pedal stroke is too small (knee too bent). Try raising your saddle about 6-12mm, then record again.
Perfect! Your saddle height falls within the optimal range.
Side on, on your trainer, 30 to 90 seconds of easy pedaling.
The AI tracks your joints and measures every angle against its target range.
See what is off and which way to move it, then record again to confirm.
Real feedback from cyclists who fitted their bikes with 2BikeFit.
“A remarkable bike-fitting app. After trying it, I was impressed. For the price, it offers plenty of attempts and, above all, the results are easy to reproduce. I love it, I'm sold! It helped me feel comfortable on my bike and rediscover great sensations while riding.”
“I tried it too, and it really is a great tool. The one thing I'm still missing is a recording from the front so that riding position can also be analyzed from that angle.”
“I had my road and gravel bikes fitted to my specs. The website is incredibly user-friendly and clearly structured, and any question I had was answered right away by the tips. I love that you focus on one point at a time and only move on once it's sorted. 2Bikefit is absolutely brilliant, I'll definitely use it for future bikes.”
“The UI and reasoning are among the best I've tried. I really like that the results are presented as ranges. This app has the potential to be very good.”
“As a new cyclist, I absolutely loved how well this app guided me through every bike-fit adjustment. The recommendations were clear and easy to follow, and they helped significantly reduce my knee pain. I now feel much more comfortable and confident on the bike!”
“2Bikefit is the result of a lot of study, biomechanics, computer vision, and the science behind a proper bike fit, built so a single video gives you what used to require a studio. I held it to the standard I'd want for my own bikes, and I've used it to fit myself and my friends before putting it in front of anyone else.”
“A remarkable bike-fitting app. After trying it, I was impressed. For the price, it offers plenty of attempts and, above all, the results are easy to reproduce. I love it, I'm sold! It helped me feel comfortable on my bike and rediscover great sensations while riding.”
“I tried it too, and it really is a great tool. The one thing I'm still missing is a recording from the front so that riding position can also be analyzed from that angle.”
“I had my road and gravel bikes fitted to my specs. The website is incredibly user-friendly and clearly structured, and any question I had was answered right away by the tips. I love that you focus on one point at a time and only move on once it's sorted. 2Bikefit is absolutely brilliant, I'll definitely use it for future bikes.”
“The UI and reasoning are among the best I've tried. I really like that the results are presented as ranges. This app has the potential to be very good.”
“As a new cyclist, I absolutely loved how well this app guided me through every bike-fit adjustment. The recommendations were clear and easy to follow, and they helped significantly reduce my knee pain. I now feel much more comfortable and confident on the bike!”
“2Bikefit is the result of a lot of study, biomechanics, computer vision, and the science behind a proper bike fit, built so a single video gives you what used to require a studio. I held it to the standard I'd want for my own bikes, and I've used it to fit myself and my friends before putting it in front of anyone else.”
Tried 2BikeFit? We feature real riders here. Share your experience at support@2bikefit.com.
Scan your position for free and see whether your saddle height and setback are in range before your next long ride.
Free scan. You'll need your bike on a trainer or rollers, your phone, and about ten minutes.