Bendix Spicer Foundation Brake says the new, higher performing version of its Extended Service drum brake was developed to meet the new federal stopping-distance requirements mandated by the National Highway Traffic Safety Administration (NHTSA).

The improved single-anchor-pin ES brakes will be available in a variety of sizes for steer-axle applications. They’ll be phased into production and will be fully launched by Aug. 1, 2011 when the new stopping distance regulations kick in.
NHTSA has demanded a 30% reduction in stopping distance for new three-axle tractors with gross vehicle weight ratings up to 59,600 lb. Tractors with two axles, as well as severe-service tractors with GVWRs above 59,600 lb, must comply with the new mandate by Aug. 1, 2013.

These High-Performance ES brakes were engineered to develop the increased torque necessary for shorter stops. And, says Bendix, they sustain that torque, which reduces brake fade and allows shorter stops.

The brakes show three enhancements:

One is bronze bushings that are said to be more durable than plastic types. They’re optional on existing ES drum brakes, but will become standard on the new models.

As well, the use of precision cams helps reduce variation and improve overall braking performance.

And the new High-Performance ES brakes use new "state of the art" lining materials.