Surly Nate 26x3.8 Folding Tire

The kung-fu grip of the fat tire world.

Tall, widely spaced knobs with siping for added grip
More aggressive tread than the other Surly fat tire options
Tread wraps around to the side of the tire a bit which allows for continued traction while turning
Updated model with thinner casing; improved traction at low pressures and 100-200g lighter than standard 120tpi version