The SmartWay-verified BluEarth 109L UWB (ultra wide base) trailer tires, from Yokohama, feature an optimized tread pattern with even circumferential grooves to improve fuel efficiency. A highly durable zero-degree belt assures a consistently stable footprint for long, even wear. The tire's compund provides one of the lowest RRCs in its tire category, without sacrificing treadwear, according to the company. The 109L UWB allows for improved traction, especially for powerful braking in inclement weather, and service life due to optimized sipes. Offered in 445/50R22.5, the 109L UWB includes a six-year, three-retread warranty.