Stan's Flow EX3 Rim The Flow EX3 is the most reliable tubeless rim made for handling faster speeds on the most demanding trails. Features Patented low-profile tubeless rim design Tiebeam triple-cavity rim design resists damage and prevents air loss29mm internal width optimized for 2. 35" to 2. 8" tires6069 aluminum alloy construction | Stan's No Tubes | Stan's Flow Ex3 Rim 29 Disc | Black | 32H | Aluminum