5/1/2008 - Heavy Duty Trucking MagazineSingle Wide Tires (aka "Super Singles" Evan Lockridge, Contributing EditorAfter years of talk about the benefits of single-wide tires, the market might finally be showing signs of real growth. The biggest purveyor of these tires –which replace the dual tires on a tractor or trailer with a single tire – is Michelin. In February, the company announced that sales of its X-One line doubled last year. In fact, they've done so every year since they appeared on the market in January 2001, and Michelin has expanded its production to a second tire plant.Currently the only other tire manufacturer actively selling single- wide (also called wide-base) tires is Bridgestone/Firestone. While Michelin's vie that single-wides can be used in most any application, Bridgestone/Firestone sees them as a niche product, mainly for fleets that need all the weight savings they can get, such as bulk haulers.