Aileron Rim 650b NONmDescription Velocity Aileron 650b (27. 5") NON m rim is a modern wide alloy rim designed specifically for disc brake gravel and endurance wheel builds. This non machined version eliminates a rim brake track, focusing purely on strength, clean aesthetics, and tubeless performance. With a welded joint and wide internal profile, the Aileron supports higher volume 650b tires for improved comfort, traction, and control on gravel roads and rough pavement.