Roval 321 Disc Rear Wheel

Roval 321 Disc Rear Wheel

AERO, STABLE, LIGHT, EFFICIENT? YES PLEASE!

The clock is the toughest competitor of them all. The revolutionary 321 is purpose-built to give you an edge in the race against time. In real-world conditions, it is the most aerodynamically efficient wheel ever made; featuring a unique asymmetric, lenticular construction that cheats wind and conserves precious watts. At 1000 grams, it’s also the lightest production disc around.

AERO’S LEADING EDGE

The tubeless ready, 19mm inner width of the 321 rim is tailored to fit modern, wider tires. The wheel itself is the result of rigorous testing in our wind tunnel to ensure that it delivers maximum laminar flow and aerodynamic efficiency with those same wider tires. Through innovative geometry and layup we created a 1000 gram wheel; no production disc is lighter.

ASYMMETRICAL SENSIBILITY

The non-drive side of the 321 is the most aerodynamically efficient shape possible; it bows in a lenticular form from the hub to the rim. We would have done that with the drive side as well, but we had to make room for the cassette and chain, so that side is flatter, but still very slippery.

SILKY BEARINGS SAVE PRECIOUS WATTS

CeramicSpeed bearings are the lowest friction, most energy efficient bearings money can buy. When seeking out hundredths of seconds and applying every available watt of energy to maximize speed, this level of attention to detail matters. Keeping with this theme of performance above all else, the 321 hubs are finished with precision DT Swiss 240 freehub internals.

THE CRUCIBLE OF TRUTH

Long before seeing any pavement, the 321’s shape was honed through successive iterations of prototypes. Each one of those prototypes was fed into our wind tunnel, tested for all possible conditions, then sent back for revision. The final production wheel represents thousands of hours spent testing in this exacting arena and the results speak for themselves, including Ironman World Records, UCI World Championship titles, and Grand Tour stage wins.

Link to the manufacturer's website:

https://rovalcomponents.com/collections/triathlon/products/roval-321