Stan's No Tubes Crest MK4 29" Rim Light and Durable 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 and rolls fast on the XC course or gravel loop, then you'll want the Stan's No Tubes Crest MK4 29" Rim. It has a versatile 25mm internal rim width that is optimized for up to 2. 3" 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 25mm internal rim width optimized for up to 2. 3" tires Light and durable 6069 aluminum with a welded joint and reinforced spoke bed Tubeless-ready for a smoother ride, better traction, and fewer flats SPECIFICATIONSSize29"Material6069 Aluminum Outer Width28. 4mm Inner Width25mm Height18mm Spoke Drilling28H, 32HERD601mm, 1. 5mm Offset Valve Type Presta Tubeless Yes Tire Type Clincher Brake Compatibility Disc Intended Use Gravel, XC, Cyclocross Weight399g | Stan's No Tubes | Crest Mk4 29" Rim Disc | Black | 32H | Aluminum