In a Linnaean taxonomy of the world of wheels, HED's Ardennes Plus GP Disc Brake Clincher Wheelset would fall in relation to the road and cyclocross genus without belonging wholly to either one. This dual phenotypic citizenship recommends it as the most pure example of a gravel wheelset that is to say, a wheelset that's anything but purely classifiable in a single category. The GP model combines a centerlock disc interface with no nonsense, round spokes and a tubeless ready bead for a wheelset that's every bit as tough as its price is low. And ok. Normally we don't spend a lot of time lingering on price, but in the case of the HED GP, it's worth highlighting. A wheel with 25mm wide rims 21mm internal width and disc brake compatibility at this pricepoint is unheard of. Ardennes Plus wheels are every bit equal to 'cross and gravel racing, but the GP version brings the line to a price that makes picking up a pair for training purposes a feasible reality rather than an I'm not sponsored pipe dream. The main difference between it and the lighter, more race oriented Ardennes Plus models are the spokes, which are round instead of bladed and butted, further recommending the wheels for the hard knock life of all terrain training abuse. By now, you're probably well familiar with the advantages of the Ardennes Plus's wide rim. With a 21mm internal width, the rim lets larger tires fill out more, expanding air volume and straightening side walls. This reduces the lightbulb effect that skinnier rims produce, putting a larger tire patch in contact with the ground, improving rolling efficiency in the straights, increasing cornering confidence and grip, and letting you run lower PSI for a plusher, more supple ride. HED recommends a maximum PSI of 100. There are also some aerodynamic advantages to the more consistent line from tire to rim, but ride quality and durability are the GP's primary goals. When paired with 28 or 30mm tires, the Ardennes Plus GP melts punishing ch...