Influence of Front Tyre Wear on Wet Braking Performance of Medium Trucks

Testing of truck tyres of a 3/6 rib pattern configuration with varying degrees of even and uneven (one-shoulder) wear on a variety of road surfaces has shown a fairly consistent relationship between even and uneven worn tyres of similar pattern depths. When a wheel slip brake control system is operating, the relationship between the braking force of even and unevenly worn tyres is noticeably speed dependent. A wheel slip brake control system gives an improvement in overall vehicle retardation on all surfaces involved in the evaluation, which improvement may be speed dependent.