Professional Cleat Fitting

What is a RAD and Why Use One?

In simple terms, a RAD (Rotational Adjustment Device) is a tool developed by Fit Kit Systems to match each individuals' pedal cycling motion with his or her cleat. When adjusted correctly it helps eliminate stress on the knee, hip, and ankle, and also allows for safe entry into and exiting from the pedal.

In more detail, the RAD is a pedal mechanism that detects lower leg rotation. It is important to know how the lower leg rotates in relation to the pedal during a bicycle pedal stroke, and accommodate this rotation. Since the foot is fixed in place with the cleat, it is imperative that the cleat is adjusted to allow for this rotation. If it is not, difficult entry and exit to the pedal system, and/or equipment induced injury to the knee, hip, or ankle can result.

Red and White Determinant bars are placed at two separate axis. One is on the axis of the cleat, which identifies the lower leg; one is on the axis of the pedal spindle, which identifies the pedal position.

The movement of the red and white bars gives the fit technician a visual comparison of the movement between the cleat and the stable position of the pedal. With the axis of the pedal stationary, the axis of the cleat will move, and the Red Bar will fluctuate in front or behind the White Bar (stationary pedal axis) indicating the rotation of the lower leg.

When the technician adjusts the cleat axis (Red Determinate Bar) to match the position of the pedal axis (White Determinate Bar) the position of the riders natural movement of the foot is met. Red and White Bars line up. This secures the cleat in the rider’s unique natural movement, or natural gait. Having the foot rotate through each pedal stroke with the riders unique style will help eliminate “equipment induced stress” on the knee, hip and ankle and allow for safe entry and exit in the pedal.