DT Swiss GR 531 Disc 700c Rim. Features: 25mm deep, tubeless ready, disc specific rims are lightweight and offer superior Gravel and Adventure riding performance A nearly seamless welding process and a special anodizing treatment boost strength while remaining durable DT Swiss 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 Specs: Internal External:24/28mm Holes:24h ERD:594mm Color:black Weight:535g