Abstract
A tyre intermix classification system, based on measured side force properties of individual designs, was developed and validated to improve on current industry recommendations utilizing categories of construction type and section size ratios. The system predicts intermix caused changes in a vehicle's understeer gradient as a mid-performance cornering operating point. Based on prohibiting differentials exceeding 3 deg/g, this system proved more effective in limiting unacceptable intermix than the current recommendations.