My name is Jon Underhill, and I am a Professional Independent Bike Fitter and the creator of CORE Bike Fit. I founded CORE Bike Fit to assist cyclists of all levels in creating their own Optimal Rider Experience, tailored specifically to their needs. This mission inspired the name CORE Bike Fit, encapsulating the essence of my work.

Whether you are new to cycling and looking to prevent injury, have shifted your cycling goals, are recovering from an injury, or are a professional seeking to gain extra watts, I am here to help you Create your Optimal Rider Experience. These principles are at the heart of everything I do, applying to riders of all abilities and needs.