Designed to eliminate the drag penalty normally associated with running bigger tires, the Hollowgram 45 Knot manage to pack all the comfort, rolling resistance and grip benefits of larger volume tires into one of the absolute, bar none, fastest all around wheelsets on the planet. The 45mm deep rim is the perfect depth for alps passes to hammering the flats. The disc-only design is significantly wider than other road wheels and that extra width both makes small tires bigger (a 23c tire measures a full 26mm on our wheel) and helps air flowing over the larger tire reattach cleanly to the rim, maximizing flow attachment and minimizing drag. And as a bonus, while they’re optimized for 26mm (23c) tires, the Hollowgram 45 Knot design exhibits minimal drag with even larger tires, giving riders the option to go bigger without slowing down. It’s speed for every road.