Track Roller supports the weight of our heavy machines and guides the track chain as it moves. We mount these rollers in the lower undercarriage frame so that the metal tracks roll over them smoothly. Made from tough, heat-treated steel, they resist wear from dirt, rocks and bumps. When one roller starts to wear out, we replace it fast to keep downtime low. It is like the wheels on your bike that keep the chain moving. No squeaks, no complaints.