BDC — Bike Fitting by Phone

Field notes

BDC uses a side-on phone recording rather than requiring the rider to understand bike-fitting angles. The stated workflow places the bike on a trainer, positions the phone roughly three metres away, counts pedal strokes, and evaluates joint positions at defined points in the rotation. Its seven-angle model connects measurements to adjustments such as saddle height, reach, bar height, and stem length. The page separates a free saddle-height check from a paid full fit covering both legs and a retained record.