XR 391 Modern welded Cross Country rim, designed with an inner width of 25 mm. The latest-generation XC rim: the right size to fit sufficiently wide tires and dominate the competition on today’s demanding Cross Country courses. The XR 391’s welded construction and its micro-beaded, anodized finish will be matched only by the flair of your style. And with its specific Cross Country profile, special alloy, and PHR nut-to-spoke interface, it achieves the feat of combining width, durability, and lightness.