Multipiece Rims for Trucks, Buses, and Trailers-Economic Effects Caused by Further Regulation of Rims in Standard No. 120

摘要

Data gathered over an extended period of time indicate that multipiece truck and bus wheel rims have caused accidents resulting in injury and death. This study was carried out for the NHTSA to determine the potential cost effectiveness that would result should the use of multipiece rims be phased out of production by rulemaking action. The study identifies one time conversion costs, added cost to truck users and the feasibility of a 5-10 year phase-out program. These costs are then used to arrive at a cost effectiveness factor in terms of reduction in incident that could occur. The differential incident rate between multipiece rims and single piece wheels plays a key role in establishing the cost effectiveness.