Michelin XLET- position trailer. A commercial tire, the X Line Energy T is designed for long haul applications and offers drivers excellent mileage and improved durability. Features & Benefits Tread is designed for commercial truck applications. Black sidewall. Built with Michelin's Advanced Technology Compound to lower rolling resistance and improve fuel efficiency. Commercial drivers who frequent conquer many miles on their delivery need as tire that's built to last. Consider the X Line Energy T from Michelin, which features an optimized contact patch within the tread and a shoulder groove for added resistance to irregular wear. Handling is improved by four wide grooves that remove water, and the X Line Energy T's Advanced Technology.