Push the boundaries of what fat bikes can do and where they can go with the Hugo 52 rims and wheelsets, the first rim to feature true NoTubes' technology for fat bikes. An innovative raised center and ultra-low profile allow easy tubeless inflation, roll faster and give unbelievable traction. For fat bike riding, racing and adventuring. First fat bike rim to feature genuine NoTubes' tubeless technology with innovative raised center rim profile for tubeless use. Rim width: 52.3 mm external and 49.9mm internal for maximum tire volume and flotation. Multiple cassette and front and rear axle options. Compatible with plus and fat clincher tires when used with 27 mm Yellow Tape, 35 mm Valve Stem, and NoTubes Sealant. Optimized for 29+, 27.5+ and 26-inch fat bikes. Multiple cassette and front and rear axle options.