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Elan 12-speed hub
From WikiPedalia
SRAM/Sachs briefly offered a 12-speed internal-gear hub around the year 2000. Unfortunately, it was a flawed design, and almost all of them broke. They are heavy, too! This hub achieved 12 speeds in steps which became narrower toward the top of the range, using an unusual and clever design. No parts are available, they can not be repaired.
