DT-Swiss XM 481 Rim. Features: 21mm deep, tubeless ready, disc specific rim A nearly seamless welding process and a special anodizing treatment boost strength while remaining durable DT-Swiss's patented Pro Head Reinforcement System (PHR System) is designed to balance the load transferred to the rim, working as a ball and socket interface, requiring unique washers and Squorx nipples Rims include Squorx nipples and washers Specifications: Wheel Size: 27.5" or 29" ISO Diameter (ETRTO): 584 or 622 Effective Rim Diameter (ERD): 563mm (27.5") or 601mm (29") Spoke Count: 28H or 32H Brake Type: Disc Brake Rim Joint: Welded Rim Dimensions: 30mm (Internal), 35mm (External), 21mm (Depth) Valve: Presta Tire Type: Tubeless (Clincher) Material: Aluminum Color: Black Weight: 490g (27.5"), 525g (29")