Last year, Modern Tire Dealer asked me to write an article comparing the 1970 Lincoln Continental MK3, the first American automobile to be equipped with radial-ply tires as standard original equipment, with a more recent Lincoln model. The purpose was to show how technology has advanced — and, in some cases, regressed — and what these changes and possible trends tell us about what is to come.
Question 1: Are green tires truly green? Answer: Not as much as the tire manufacturers would like you to believe.
In January 2002, Modern Tire Dealer published an interview with me titled, “Tires from an engineering perspective.” In that interview I stated the following projects tire manufacturers should undertake in the future:
Tires play a vital role in vehicle operational safety. However, they have not always been viewed as products ripe for safety enhancements.
Traction controls the propelling, cornering and braking of a vehicle through the friction of the tire treads and the road surface, hence providing safety. The field of traction is complex, particularly when considering the road/tire/vehicle/driver system interactions involved.
This is the third in a series of articles about tire design by Jacques Bajer, president of Tire Systems Engineering Inc. In the first, he analyzed the causes of tire structural integrity degradation. In the second, he explained how tire rolling resistance affects vehicle fuel consumption.
Tire rolling resistance, also called tire “drag” or tire “power wastage,” is a relatively small force. It is expressed in pounds per 1,000 pounds of tire load (eight to 15 pounds per tire at moderate speeds of 25 to 45 mph), and is extremely difficult to measure under real world vehicle operating conditions. Consequently, it is measured with indoor tire testing machines.