The casing is a 4-ply, 240tpi system that is amazingly supple for any tire let alone the ProTection Apex tire. The lighter, more flexible Cordura sidewall protection is much more flexible and compliant than the previous version, still with high-level resistance to cuts, impacts, abrasion, etc. Again, this allows the tire to react and conform to the terrain better without the rider being concerned about flats or blowouts. Apex, formerly found in Conti's DH offerings, starts at the bead and moves up about 60% of the sidewall height. The Apex Zone virtually eliminates any form of impact pinch flats and prevents the dreaded sidewall tears near the bead that end a ride, and can easily result in rider injury. Again, super crucial with lower pressure, high volume tires. The improvement of the newer, flatter Revolution tubeless bead is also enhanced by the pliable sidewall strength and casing suppleness.

What does a wider "mouth" refer to? You know when you open up a tire and the bead sit close to each other- inward? That is a more closed mouth. When you open it up the beads naturally are further away, that is a more open mouth. This pertains to both the overall shape of the tire and how it sets up on the rim. Tires with a naturally open mouth seal and seat more easily when mounting tubeless, and create a better overall shape for the tire on the rim- less bulbous, even on a narrower rim. Which raises the next point. Continental has optimized the tread and volume of each tire size for specific internal rim widths, and that is listed on the sidewall of each tire. Keeping the rim/tire combination size appropriate will result in best performance. And with a 2.6" tire you don't want to have to wrestle with it for too long. In the past, Conti had some issues with listed tires sizes being inconsistent to the actual tie. The new TruSize standards direct that the tire be within 1-2mm of listed size with the proper rim and inflation.

We see the Der Kaiser Projekt as an exemplary World Cup DH tire, which is really where it's roots lie. And yet it actually makes a great, if heavy, trail tire for the summer season all over the US and a year round tire in the high mountain/desert states. That said, it isn't a mud tire. The knobs and sets are too closely spaced and the ramping that maintains speed mitigates bite in wet mud. In moderately wet conditions, you could opt for a Der Baron up front and Der Kaiser in the rear. There is little doubt that once it is sparked into action, the Continental development/engineering program is world class. Durability and high grade materials are never sacrificed, nor is the company's ability to self critique. We are impressed by the whole new ProTection and Protection Apex series tires, and know the value and appeal of the Der Kaiser Projekt Tire. If you choose wisely based on your needs and conditions, you will as well.