Here’s a picture of the completed Schwinn Twinn overhaul. This bike had tons of corrosion going on inside, places that were’nt appearent from the outside. Once we opened up the bearings we quickly discovered lots of rust. Also, take an inside look of the Atom Drum brake before we cleaned out the old brake shoe residue and rust from the original ball bearings (which were all replaced with new 1/4″ bearings). The atom drum is cable actuated and the brake arm expands the two brake shoes which puts pressure against the inside walls of the hubshell. The side shot of the hub shows how thick the braking surface is…..no weight savings attempt going on here.