The RoadX TR528 R3 is designed specifically for trailer applications. The TR528 R3 is engineered with an advanced rubber compound which delivers excellent tread wear and fuel saving performance. The TR528 R3’s tread design resists irregular wear and minimizes skid wear. Its wide center groove features “stone ejectors” to prevent stone drilling, thereby extending tire life and improving retreadability. SmartWay verified tires can improve fuel efficiency by 3 percent or more.