The SLR 1 42 Disc wheels are efficient, lightweight, all-around carbon wheels that offer premium performance to all riders. The SLR 1 42 Disc features a hookless rim design and optimized carbon layup for a durable yet lightweight rim, a modern 19.4mm internal width, and low-friction hubs with low rolling resistance and Dynamic Balanced Lacing (DBL) technology for maximum power efficiency. Outstanding performance without compromise.