Created for the type of rider willing to take two wheels into conditions that would leave lesser mountain bikers safely indoors, the all-new Atomik Carbon PHATTY 85mm is here. The single greatest upgrade available for any fatbike, the PHATTY 85 features a monster 85-millimeter width (77-millimeter inner diameter) to maximize the footprint of your fat tires and give you a ride with ungodly grip in all conditions.

Featuring HDP (High-Density Performance) Foamcore technology and Solowall construction, this aerospace-inspired carbon fat rim sets the standard for strength, weight and ride quality with an impressive 16-millimeter low-profile design engineered to minimize damage from trail shrapnel to keep them looking better longer. The minimal surface area also means the nasty stuff you’re likely to encounter in loose conditions where big tires shine—from snow, to muck, to sand—won’t have much to cling to, reducing unwanted weight and mess.

Although the PHATTY 85mm is deceivingly light at 590 grams, don’t be fooled—it’s still a heavyweight built to take abuse. Light can be strong, and that’s why we wrapped our high-modulus blend of Toray 700 and 800 around our aerospace-grade HDP Foamcore to enhance stiffness and damping qualities for a ride you’ll have to experience to believe.

A beefy 3.5-millimeter modified bead hook helps to dissipate the force of impacts through the sidewall when things get ugly, and BeadLock allows you to run lower pressures for maximum traction.

Throw a set on your fat bike and see how the Phatty 85mm can transform you ride.

Rims: $742.50 each
Complete wheel set starting at: $1,815