Understanding Magnetic Resistance

Most bikes, ellipticals, and FreeStriders use magnetic resistance to allow users to experience tougher workouts. There are two designs of magnetic resistance that are currently used by our machines: C-Brackets, and Eddy Mechanisms.

C-Brackets

This design uses a C-shaped magnet bracket that is contoured to the shape of the flywheel. The bracket is bolted to the frame of the machine at one end. This acts as a hinge to allow the bracket to move closer or farther away from the flywheel. An adjustable tension cable is attached to the other end of the bracket. This cable adjusts the resistance level by being moved by either a tension knob or a tension motor.

This design can be calibrated by setting the resistance to its maximum setting, then removing the side shields from the unit and loosening the jam nuts at the end of the tension cable. After they are loose, adjust the magnet bracket until the gap between the bracket and the flywheel is equal for the length of the bracket, approximately ¼ inch. When this is done, tighten the jam nuts to secure the bracket in this position, and then reattach the side shields.

Eddy Mechanisms

Eddy Mechanisms are similar to C-Bracket designs. The main difference is that the magnet brackets are contained within the flywheel. There are also two link arms that connect the magnet brackets to the tension motor. As the resistance is changed on the console, the motor moves the link arms, thus changing the position of the magnets and adjusting the resistance level.