Stan's No Tubes Arch MK4 29" Rim A Highly Versatile Rim When it comes to your speed, acceleration, and handling on the trails, the rims you use play a significant role. If you're looking for a rim that is light enough to take on XC racing, but durable enough for aggressive riding, then you'll want the Stan's No Tubes Arch MK4 29" Rim. It has a versatile 28mm internal rim width that is optimized for 2. 2" to 2. 5" tires. The rim is made of lightweight 6069 aluminum with a welded joint and reinforced spoke bed. It is tubeless-ready so you can ditch the tubes for a smoother ride, better traction, and fewer flats. Features Versatile 28mm internal rim width optimized for 2. 2" to 2. 5" tires Light and durable 6069 aluminum with welded joint and reinforced spoke bed Tubeless-ready for a smoother ride, better traction, and fewer flats SPECIFICATIONSSize29"Material6069 Aluminum Outer Width31. 4mm Inner Width28mm Height18. 9mm Spoke Drilling28H, 32HERD600mm, 2. 5mm Offset Valve Type Presta Tubeless Yes Tire Type Clincher Brake Compatibility Disc Intended Use XC, Trail Weight481g | Stan's No Tubes | Arch Mk4 29 Rim Disc | Black | 32H | Aluminum