Gravel racing rewards wheels that can absorb punishment without demanding attention, which is where aluminum construction continues to earn its place despite carbon's dominance in the performance market. The Ritchey WCS Zeta GX Disc wheelset pairs heat-treated aluminum rims with the brand's Phantom Flange hub design, creating a disc-brake-specific system built for the sustained abuse of mixed-surface racing and adventure riding. The 25mm internal width accommodates tire sizes from 35mm up through 50mm without the pinch-flat concerns or bead-seat compromises that narrower rims introduce when running lower pressures on rough terrain.

Phantom Flange hubs use a distinctive spoke interface that positions the flanges closer to the hub shell's outer edges, which increases the bracing angle and creates a stiffer, more responsive wheel without adding material weight. The design also simplifies spoke replacement—a consideration that matters when you're hundreds of miles from a shop and need to address damage trailside. Ritchey laces the hubs to the Zeta GX rims using straight-pull spokes in a 24-hole front and 28-hole rear configuration, balancing weight savings against the durability demands of loaded riding and aggressive descending.

Tubeless compatibility comes standard, with the rims designed around tubeless tire bead profiles rather than retrofitted from clincher designs. The spoke bed is tubeless-ready, requiring only tape and valves to run sealant-based setups. Center Lock rotor mounting handles disc brake duties, with the interface positioned for quick rotor swaps when moving between bikes or upgrading brake hardware.... Read More