Set up the photo
Use a trainer if possible, keep the camera perpendicular to the bike, and capture your full body from the side.
Saddle height calculator
Find your bike saddle height with AI
Saddle height is the first bike fit setting to check. BikeFittr measures your knee angle from a riding photo and helps you decide whether to raise, lower, or keep your saddle position.
Best for
DIY bike fit at home
- Check knee angle from a side-view cycling photo
- Get practical raise, lower, or keep recommendations
- Avoid common signs of a saddle that is too high or too low
- Improve comfort before changing reach or handlebar position
Run the saddle analysis
BikeFittr estimates your knee angle and compares it with bike-fit target ranges for your selected riding style.
Make a small adjustment
Move the saddle in small steps, usually a few millimeters at a time, then re-check before making larger changes.
Common questions
What happens if my saddle is too high?
A saddle that is too high can cause hip rocking, hamstring strain, Achilles discomfort, and loss of control at the bottom of the pedal stroke.
What happens if my saddle is too low?
A saddle that is too low often creates excessive knee bend, quad fatigue, front knee pain, and reduced pedaling efficiency.
Should I use inseam formulas or knee angle?
Inseam formulas are a useful starting point. Knee angle from your actual riding position is more specific because it includes shoes, pedals, crank length, and how you sit on the bike.