Step 3: The Dynamic Fit:
This is where the magic of the Retul bike fit comes alive. As I was warming up Jim started placing these velcro patches all over me. Patches were placed on my shoulders, elbows, wrist, legs, ankles and hip. This is why a sleeveless jersey is needed. These patches would hold the infrared “nodes” that the computer would use to make up my dynamic 3D model. The dynamic fit uses both 2D and 3D data to analyze the motion of you on your bike.
The 3D dynamic fit process is the big difference, it’s what’s used to make the fit decisions. The 3D dynamic fit is a big difference when compared to the traditional static bike fit. You constantly pedal while the computer is reading these “nodes” and creating a wireframe model of your position in real time. During the data gathering process I was asked to pedal at around 80rpm for about 2 minutes. After each 2 minute data gathering session, we’ll call these a “data cycle”, the information was presented to me in a chart that displayed my numbers and compared them Retul’s “acceptable” numbers. Numbers that were displayed in RED were considered out of range. Numbers in GREEN were considered acceptable. The goal was to get all the various meausing points to GREEN. So we would start a new “data cycle” and repeat this process as necessary until all idenfitifed measurements were GREEN or as close to GREEN as possible.
While gathering all these data points during the “data cycle” phase Jim was also taking note of all the parts, pieces, sizes, length that made up my bicycle. Jim noted the bike make, model size. He noted the stem, the crank size, the crank length, handlebar make, model, width, drivetrain. It’s all captured and noted during the bike fit and again presented in the final Retul report (Click here for example Retul report).