Browse Publications Technical Papers 2006-01-1559
2006-04-03

Force and Moment Characteristics of Two Space-Saver Tires 2006-01-1559

Many modern vehicles utilize so-called “space-saver” spare tires. Such tires are not fitted to the vehicle and driven on until a tire problem has arisen with a service tire, and are limited in the mileage and speed at which they can operate. They also may have quite different characteristics (rolling radius, tread pattern, contact patch width and length, aspect ratio, stiffnesses, self-aligning torques, etc.) than the service tires with which the vehicle is equipped. As such, they have the potential for presenting significantly different handling signatures to the driver when they are fitted..
In the present work, we present force and moment characteristics for two disparate space-saver spare tires. The tires were tested at the T.I.R.F. (TIre Research Facility), Calspan Corporation, Buffalo, NY. Using the data obtained from the experimental tire test program, under-steer gradients (UG) were calculated for two vehicles typical of those that would employ each respective tire (sports car, passenger car).

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