Updated HDR drive tire

Continental Tire has announced updates to its HSR and HDR tires. Available now for both original equipment and replacement, the improved HSR (Heavy Steer Regional) and HDR (Heavy Drive Regional) in size 225/70R19.5 offer up to a 20% improvement in rolling resistance and mileage over the original models, the company says.

Compounding is said to be the backbone of the improvements, with structural modifications as well, which are said to have resulted in longer wearing, cooler running, and more fuel efficient tires.

The improvements will help OEMs meet their 2014 EPA- and NHTSA-mandated “Greenhouse Gas Emissions and Fuel Efficiency Standards” targets for rolling resistance and emissions reduction, but Continental says they also resulted in improved ride and handling characteristics. The tires’ rolling resistance coefficients have been measured using the ISO 28580 standard and have been added to the Greenhouse Gas Emissions Model database for manufacturers of Class 2b – 8 vocational trucks, classified as Category 3 by the EPA.

The HSR offers speed rating ‘N’ for optimum handling at highway speeds. Tread depth is 16/32 in. for the all-position tread pattern, which provides long mileage in regional and local service. The improved HSR still offers a closed-shoulder tread pattern for even wear and reduced noise, and a scuff rib to protect against curbing, cuts and abrasions.

The HDR also offers speed rating ‘N’, and features a tread depth of 18/32 in. The HDR still has an open-shoulder tread pattern with tie-bar, which is said to provide even tread wear along with reduced noise and good traction. Its aggressive tread design provides lateral stability to minimize squirm and perform well in wet conditions.