A proprietary blend of EPDM (ethylene, propylene diene monomer) rubber allows Gates FleetRunner to retain its flexibility on drives where extended high operating temperatures cause other belts to harden, crack and ultimately fail.  Fibers built into the belt improve stability and reduce belt turnover, while also lessening premature failures due to drive misalignment.

Gates patented EPDM compounding also resists deterioration from ozone and water-based coolants.

To further increase belt life and reduce downtime, Gates designed its FleetRunner belt with an underside notch pattern that provides flexibility and reduces bending stresses on drives with small diameter pulleys and short spans.

In field tests that included stop-and-go and highway running, Gates FleetRunner belts lasted a minimum of twice as long as other belts on the most severe applications.  In other tests, FleetRunner belts went 250,000 miles and more with only minimal signs of wear.