These stereotypes are generated by comparing morphology, fitness and riding style. You might have long legs or short, you might be lean or be carrying an extra 30 pounds. You might ride steep or less so. By the time I'm done I'll have prescribed for just about everyone.

For this exercise the metrics on which I’m focusing are Pad Y and X, that is, the rise and run, in millimeters, from the bottom bracket up to the height of your aerobar pads, and then out to the center of those pads. This aren't the only metrics that can be used to prescribe a bike, but using Pad Y and X allows me to back into the prescriptions for all kinds of tri bikes, super and mortal.