A developer built MyBikeFitting, a free web tool that uses pose detection AI to analyze cycling biomechanics. After months of knee pain from cycling, the creator found professional fittings expensive and online guides too generic. He leveraged his phone's HD camera and MediaPipe for client-side pose estimation to create a privacy-first alternative.

The tool measures joint angles like knee and hip position during a pedal stroke, offering adjustments without requiring an account or sending data to a server. It runs entirely in the browser, supporting multiple languages, and aims to help weekend cyclists with basic fitting issues. The developer tested it against his own measurements, finding it within 2-3 degrees of accuracy.

For cyclists facing similar pain, this tool provides a practical starting point, though it won't replace professional fittings for competitive athletes. The developer is seeking community feedback to improve the UI and detection accuracy. It demonstrates how accessible AI can solve niche, personal problems with minimal resources.