Why the 'right' bike fit is a range, not a number

BFF EZ offers a cheap, quick dynamic fit you can do at home with just your phone, bike, and a trainer. From a single 4-second side view video of you pedaling, it reads the angles of your knees, hips, ankles, and shoulders at crucial moments in the pedal strokes, then turns them into specific guidance:

• A saddle height adjustment in millimeters or a checkmark that no change is needed.
• A saddle fore/aft adjustment in millimeters or a checkmark.
• An upper body classification (Upright, Relaxed, or Aggressive), since the right position there is a goal-dependent choice rather than a single correct position.

It does all of this from a 2D side view, which covers the big three adjustments well. For most riders, this is sufficient to get them riding more comfortably!

Here is what BFF EZ sees in a single video: