Hey dirt riders, if you're looking for a tire that can handle the gnarliest terrain, check out the Metzeler 6 Days Extreme. This isn't some casual trail tire – it was developed with input from World Champion factory enduro riders for extreme off-road conditions. The size is 140/80-18, and it's built tough. It uses a high-resistance polyester carcass with an X-ply construction, which gives it awesome structural strength and serious puncture resistance, so you can worry less about sharp rocks and roots. The knob pattern is specially designed for insane grip and traction, whether you're in dry, hardpack, loose stuff, or even wet, slippery mud. It's proven itself, too – these tires swept the E1, E2, and E3 classes in the 2011 World Enduro Championships. It's rated for M- and R-speeds, it's DOT approved for legal road use (to connect trails), and it's a tube-type tire. Basically, if you ride hard enduro and want a tire that matches your intensity, this is a top-tier choice. Get ready to rip.
