Responsible Purchasing Guide for Light-Duty Tires and Wheel Weights Light-Duty Tire and Wheel Weight Webcast March 18, 2008 Matt Kittell Program Manager Responsible Purchasing Network

Overview  Best practices  Low rolling resistance tires  Retread tires  Lead-free wheel weights 2

Best Practices Proper tire inflation 3 1 psi drop in tire air pressure = 1-2% rolling resistance increase No excess load Less weight = lower rolling resistance End-of-Life Scrap markets, not landfills!!!

Tire Energy Use 4  1/3 lost due to rolling resistance  Inflation and LRR tires reduce rolling resistance  10% less rolling resistance = 1-2% better fuel economy

Low Rolling Resistance (LRR) Tires 5  New cars sold with LRR tires  LRR replacement tires difficult to find  Rolling Resistance Coefficient (RRC)  Specify SAE J1269, <0.01

Retreads 6  Retread tires save five gallons of oil per tire  Millions of gallons could be saved annually if light-duty vehicles used more retreads

Retread Tires 7  Bad tread does not mean bad casing  Retread method similar to new tire manufacturing  Ensure quality (e.g., federal spec ZZ-T-441H)

Wheel Weights 8 Each tire has wheel weight (Pb) 4.5 oz per vehicle 2,000 tons of lead wheel weights fall off tires each year Abrade into particles polluting water and air

Wheel Weights 9  By 2009, most new vehicles will have steel or zinc weights  Specify for steel weights in replacement market  Visit  Lead weights – BAD  Zinc weights – Good  Steel weights - BEST

Responsible Purchasing Guide for Light-Duty Tires and Wheel Weights Matt Kittell Program Manager Responsible Purchasing Network