Eclat E440 Rear Wheel - LHDThe Seismic Cassette Hub utilises a unique internal mechanism, which Eclat worked on for the past few years called TCS (Toothed Coupling System). Inspired by systems used on high end road and mountain bikes, they managed to re design this system to work inside a BMX cassette hub with a 14mm axle and a 9t driver, something which was never thought possible until now. Instead of the typical pawl based cassette hub, the Seismic hub uses 2 coupled toothed
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