Industry Nine Solix SL AR40 Wheelset

The Industry Nine Solix SL AR40 Wheelset is built around a tension that serious all-road and gravel riders know well: you want aero gains, but you also need a wheel that earns its place on a long day with loaded bags, rough chip-seal, and climbs that punish dead weight. Industry Nine's answer is the "SL" designation — SuperLite — which isn't a trim name so much as a design mandate. Every decision in this wheelset, from the carbon rim profile to the spoke count to the hub architecture, points toward the same goal: speed without compromise on the kind of roads where road bikes don't belong.

The 40mm rim depth is a considered choice. Deep enough to move air efficiently on open stretches and mixed-surface routes, shallow enough that crosswinds don't turn into a handling problem and climbs don't become a test of patience. Critically, the AR40 rim is designed to work with tires in the 30–42mm range — the widths that gravel and all-road riding actually demands. Aerodynamic optimization at those tire widths requires a different rim shape than a traditional road wheel, and the lightweight carbon construction here allows for the precise forming needed to make that geometry work. This isn't a road wheel pressed into gravel service. It's shaped for the way modern all-road riders actually ride.

Twenty-four Sapim CX-Ray spokes lace each wheel, a bladed and butted spoke that's long been a benchmark in performance wheelbuilding. The CX-Ray's aero profile contributes to the overall aerodynamic package while its butted construction manages tension across a lightweight build — keeping the wheel responsive without sacrificing durability. Industry Nine's own hubs anchor the system, bringing the precise tolerances and fast engagement the brand is known for. For a rider who spends time in remote terrain and needs a wheel that performs when it matters and holds up when conditions deteriorate, that engineering pedigree matters.

Design Benefits

1. Aero Profile Built for Real-World Tire Widths: Most aerodynamic rim design is optimized around narrow road tires — the AR40 is shaped specifically to complement tires in the 30–42mm range. That matters on gravel and all-road rides where running a 35mm or 40mm tire is standard practice, not a compromise. The result is aerodynamic performance that actually translates to the terrain you're riding, not just a wind tunnel profile built for a different category.
2. SuperLite Carbon Construction: The carbon fiber rim keeps overall wheelset weight low without trading away the structural integrity needed for mixed-surface riding. Lighter wheels accelerate faster and climb more efficiently — and on long gravel efforts where you're repeatedly punching over short climbs and surging on flat sections, that responsiveness compounds over hours in the saddle.
3. Sapim CX-Ray Spoke Lacing: The CX-Ray is a reference-grade bladed spoke used throughout high-performance wheelbuilding for good reason. Its aerodynamic cross-section reduces drag at the spoke level, while the butted construction manages the load and tension demands of a lightweight, high-performance build. Twenty-four spokes per wheel provides a balance of stiffness and compliance suited to varied terrain.
4. Tubeless-Ready System: Tubeless compatibility removes the pinch-flat vulnerability that's always present with an inner tube on rough ground. Running sealant means small punctures seal themselves mid-ride, and you can run lower pressures for better traction and comfort without penalty. For an all-road or gravel wheel operating far from support, that reliability is meaningful.
5. Industry Nine Hub Engagement: Industry Nine hubs are engineered to tight tolerances with engagement speed that translates to immediate power transfer — the kind of precision that matters when you're navigating technical terrain or sprinting out of a tight corner. The hub options span HG11, Microspline, and XDR, covering the full range of current drivetrain standards so the Solix SL AR40 integrates cleanly into your existing setup.

Final Take

The Solix SL AR40 is built for the rider who takes aerodynamics seriously on gravel and all-road terrain — someone who isn't willing to accept that going fast and going far have to mean different equipment. With a 40mm carbon rim shaped for wide tires, Sapim CX-Ray spokes, and Industry Nine's hub engineering, this is a tubeless wheelset that belongs on fast mixed-surface riding, long group rides on rolling roads, and any route where the terrain demands both efficiency and resilience. It does what it's designed to do without asking you to justify the choice.