Industry Nine Solix G UL250C Wheelset

The Industry Nine Solix G UL250C Wheelset is built for the rider who won't choose between low weight and the kind of durability that backcountry gravel actually demands. This is a carbon tubeless gravel wheelset designed to climb efficiently, descend with confidence, and handle everything in between — loose hardpack, loaded bikepacking routes, punishing double-track — without asking you to compromise on tire choice or long-term reliability to do it.

The UL designation signals genuine ultralight intent, and the carbon construction delivers on it. Where many ultralight rims narrow the inner width to save grams, the Solix G UL250C runs a 25mm inner rim width — wide enough to properly support everything from a 2.1-inch mountain bike tire down to burly 55mm tubeless gravel rubber. That range of compatibility is unusual at this weight class. It means you can build one wheelset and run it through genuinely different terrain and conditions without rebuilding around a new rim profile each season.

The engineering underneath the carbon shell is where Industry Nine's hand-built reputation earns its credibility. Direct-thread, one-piece straight-pull spokes eliminate the bend stress that makes traditional j-bend spokes a common failure point under repeated load. A single machined piece holds tension more consistently than an assembled alternative, and that translates directly to a wheel that stays true through the kind of mileage that exposes shortcuts in lesser builds. This is a wheelset that rewards riders who put serious terrain behind them.

Design Benefits

1. Ultralight Carbon Without the Width Compromise: Most rims in this weight class trade inner width for grams. The Solix G UL250C refuses that trade-off — the carbon rim profile is engineered to stay light while maintaining the 25mm inner width that modern gravel tires actually need to seat properly, hold their shape under load, and perform as intended on loose or technical terrain.
2. Straight-Pull One-Piece Spoke Construction: Traditional j-bend spokes flex and fatigue at the bend under repeated stress — it's one of the most common points of failure in a gravel wheel that sees real miles. Industry Nine's direct-thread, one-piece straight-pull spokes remove that weak point entirely, producing a wheel that holds its tension and true across long, punishing days in the saddle.
3. Broad Tire Range for Real-World Versatility: A 25mm inner rim width opens this wheelset to an unusually wide tire range — from 40mm gravel rubber to 55mm plus-adjacent tires down to 2.1-inch mountain bike tires. That kind of range means one wheelset can legitimately move between a fast gravel race setup and a loaded bikepacking configuration without compromise.
4. Driver Compatibility Across Major Drivetrains: The Solix G UL250C is available with three driver options — HG11 for Shimano and SRAM 11-speed, Microspline for Shimano's 12-speed cassettes, and XDR for SRAM's 12-speed ecosystem. Whatever drivetrain you're running, there's a spec that fits without requiring an aftermarket conversion.
5. Hand-Built Precision from Industry Nine: Industry Nine builds each wheelset by hand, which matters for more than marketing reasons. Hand tensioning and truing means each spoke is set with individual attention rather than machine tolerance averages. The result is a wheelset that arrives properly built and stays that way — consistent performance from the first ride through the hundredth.

Final Take

The Solix G UL250C is for the gravel rider who logs serious miles across serious terrain and wants a carbon tubeless wheelset that doesn't demand trade-offs. It suits riders who need real tire versatility — whether that's a lightweight race setup one weekend or a loaded route the next — and who care about the kind of build quality that holds up long after the initial ride. If you've been waiting for an ultralight gravel wheel that doesn't quietly disappoint you six months in, this is it.