In 2007, HED spearHEDed sorry, sorry the wide rim revolution with its 23mm rims. Now, it's leading the charge yet again with the Ardennes SL Disc Brake Tubulars, ushering in an era of wide rims and disc brakes, which we're confident represent the future standard of cycling. Add to this the ride quality of tubular tires, and it's hard to imagine the industry ever looking back. The 23 millimeter width of the Ardennes SL Tubular rims results in better cornering grip and lower rolling resistance than traditional 19 millimeter rims. It also orients more of the tire's sidewall vertically, which means the tire is better able to deform around irregularities in the road surface so you'll roll through bumps and pebbles, not over them. The basic width of the Ardennes tubular models does mean there are some drawbacks in these fields compared to the wider Ardennes Plus clincher models however, while recognizing that this is purely subjective, we feel that running tubs instead of clinchers eclipses the ride quality gains made by the latter's 25 millimeter width. While the ride quality of tubs is inimitable, the real selling point of these wheels is the disc brake mounts. By using a smaller diameter for its stopping surface the disc instead of the rim, disc brakes actually require more power than rim brakes to lock up. This means that, instead of around 200 pounds of force before your wheels seize, you can modulate your stopping power across a range of about 1,000 pounds. They also grab immediately in all conditions without taking a full rotation to clear debris from the brake track. As with the non disc Ardennes SLs, the hubs used here come from Hed's Sonic line. They run ABEC5 bearings on oversized axles, 12mm in front and 15mm in the rear. The flanges are spaced as widely as possible to create a stronger bracing angle, resulting in lateral stiffness that any rider approaching HED's suggested weight limit of 225 pounds will appreciate. The front hub has a carbon fiber...