HOW IT WORKS
THE TECHNOLOGY BEHIND THE FIT
As a Master Certified Retül Bike Fitter with over 23 years of experience in the cycling industry, my goal is simple - to help riders of all levels find a position on the bike that lets them ride harder, recover faster, and enjoy injury-free cycling for longer.
A proper bike fit addresses more than just comfort. It looks at the complete picture of how you and your bike work together.
MOTION CAPTURE VS. VIDEO ANALYSIS
Many local bike shops offer video-based fitting, and while it's a step in the right direction, there's a significant difference between video analysis and true motion capture. Here's how they compare:
DIMENSIONS
Video analysis is two-dimensional, even when using two cameras — meaning a small but meaningful error is introduced by not accounting for all three dimensions.
Retül captures full three-dimensional data using a 3-D spatial model. In bike fitting, small errors make big differences — especially across different disciplines like road cycling, triathlon, and mountain biking.
FIELD OF VIEW
Video cameras have a narrow field of view, requiring the camera to be positioned 1–2 metres further away from the rider to capture a full image.
Retül sensors have a wide field of view, allowing for closer, more accurate data capture without compromise.
MEASUREMENT ACCURACY
Video analysis places measurement markers on a small 2-D screen, relying on the fitter to manually trace each measurement with a mouse — after the session has finished.
Retül places markers directly on the rider's body using easy-to-locate skeletal landmarks, and performs all measurements automatically and instantly — no manual work required.
DATA QUALITY
Video analysis takes measurements from a single frame of footage, which may or may not reflect the rider's typical position.
Retül automatically averages measurements across every pedal stroke of the recording, building a highly refined model of the rider's actual movement patterns — giving a far more accurate and repeatable result.