DURA-RIDE Patented Air Spring Suspension System The suspension system that changed an entire industry's thinking on how form follows function. Dura-Ride Literature : Download (PDF) The Capacity DURA RIDEŽ system was engineered and developed to address the rising costs of workman's compensation and health care, the cost of replacing damaged components and the loss of operating time during repair. Many customers now insist on DURA RIDEŽ because it is cost efficient and their operators and mechanics prefer it. Developed to minimize stress to the tractor frame, cab and drive train, DURA-RIDEŽ isolates the tractor from road shock caused by the rough terrain found in many operations and yet provides a stable ride. Capacity has devoted many hours developing new technology. The result . . . the best built, highest quality spotting tractor on the market. Innovative ideas like DURA-RIDEŽ have made Capacity the number one tractor for operators of ports, rail yards and truck terminals. This, plus an extensive selection, has helped Capacity create the right spotting tractor for the job. Capacity units with the DURA-RIDE suspension system option will also benefit from our exclusive Dura-Plus 10-year frame warranty.