Industry Nine Whisp System Solix 29" Wheel Gram Counters Welcome XC and downcountry riders chasing weight savings without giving up engagement will find the Whisp System Solix a compelling wheel. The Whisp carbon rim is the result of a collaboration with We Are One, using hookless construction and a laminate schedule that places reinforcement only where loads demand it - keeping grams off the scale without thinning the structure where it matters. The SOLi X hub at the center runs a 121-tooth drive ring with five continuously phased pawls for 0. 59deg engagement, so the first pedal stroke out of a corner or switchback is there immediately. The 29mm inner width gives modern XC tires the casing support they need on technical terrain, and the whole system ships with a limited lifetime warranty on the carbon rim. Features Hookless carbon rim with 29mm internal width co-developed with We Are One using Convergence carbon construction with localized reinforcement for maximum impact resistance at minimum weight SOLi X hub with 0. 59deg engagement 121-tooth drive ring and five continuously phased pawls deliver 605 points of engagement for immediate pedal response SOLi X System aluminum spoke chassis straight-pull, direct-thread one-piece spokes thread into the hubshell for a rigid, flex-free junction with no special tools required for service Centerlock rotor interface required for all SOLi X M wheels; compatible with standard Centerlock disc brake rotors SPECIFICATIONSWheel Size29"Rim Material Carbon Fiber (Convergence, hookless)Inner Width29mm Spoke Drilling28h Valve Type Presta Tubeless Yes Tire Type Tubeless, Hookless-compatible Brake Compatibility Centerlock Front Axle15 x 110mm Rear Axle12 x 148mm Intended Use XC, Trail | Industry Nine | Whisp System Solix 29" Wheel Rear, 12X148Mm Boost, Microspline, Centerlock