"The A309 XC is where Reynolds draws the clearest line between "alloy wheel" and "alloy race wheel." It's built directly off the engineering principles of their 309 XC carbon line. They use the same structural priorities, the same obsessive attention to compliance and stiffness balance, just with different materials."
"The rim is 6069 aluminum, precision-welded, with a 30mm internal width. That's right in the sweet spot for modern XC tire profiles, and the STR tubeless-ready channel ensures a clean setup and a secure seal at optimal pressures. At 1,761 grams for the Pro and 1,834 for the Expert, these are legitimately light for welded alloy."
"Reynolds calls their hub philosophy ULD (Ultra Low Drag). This is a holistic approach to pawl profiles, spring rates, surface finishes, and engagement geometry; it's all scrutinized to reduce friction without sacrificing reliability. Whether it actually translates to measurable speed on course is a conversation for a proper test, but the engineering intent is real."
Reynolds, historically known for carbon wheels used by elite racers, has launched a new alloy mountain wheel line spanning XC to DH categories. The A309 XC model applies engineering principles from their carbon 309 XC line to alloy construction, featuring 6069 aluminum precision-welded rims with 30mm internal width suited for modern XC tires. Weighing 1,761 grams for the Pro and 1,834 for the Expert, these wheels are notably light for welded alloy. Hub options include Ringlé Super Bubba X with 4° engagement on the Pro model and Ringlé SRX with 12° engagement on the Expert. Reynolds emphasizes their ULD (Ultra Low Drag) hub philosophy, optimizing pawl profiles, spring rates, and engagement geometry to reduce friction while maintaining reliability.
Read at BikeMag
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