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  1. M

    Sempu T4 crank spider

    Hi folks, I've been loving riding around on an xtracycle based ebike with an ezee rear hub motor and a sempu t4 (I think) torque sensor. I've been spinning out the top end though on the 48T chainring and wanted to swap it out for 52T; or even ideally a dual ring. The trouble is so far the...
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