Our No.9 100w rim has a 94.5mm inner width to maximize the footprint of fat tires up to 5.05” wide. It’s double-wall construction makes it a unique, one of a kind carbon fat rim. It supports the structure of the tire’s sidewall for a stable, traction-laden ride while simultaneously improving your float on snow and sand. If you’re looking for the best in winter traction, the No.9 100w has you covered.