Wheel Factory hand built wheels. Stan’s MK4 premium alloy rim offers the ultimate performance across categories. 25mm internal width, built for speed and optimized for 40mm gravel tires and XC tires up to 2.3″. Shimano Tiagra RS470 hubs come with cup and cone bearing system, allowing for precision in hub bearing adjustments. Center Lock disc brake compatible. Built with DT Swiss Competition double butted spokes (2.0/1.8/2.0) and brass DT Swiss Squorx nipples. Hand laced and trued in the USA