The Gradient i30 wheels feature a 30mm internal width asymmetric carbon rim hookless design and PRS Hub technology with 72 points of engagement for unmatched responsiveness. Built with advanced materials and tested on the most demanding tracks it delivers ultimate reliability.i30 variable height hookless carbon rimAsymmetric design 24mm depth x 37mm width x 30mm ID22-24mm height rim for increased ride quality4mm asymmetric spoke bed for equal spoke tension and increased strength28h direct pull double butted spokes with brass nipplesPRS X-900 hubs with 72pt engagement