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    Volspeed 4

    Still working, not one 504 error since Install. Note I leave the limit at 21.8mph and always have.
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    What is volspeed V4?

    Volspeed V4 = Best money I ever spent. No hint of error set to 21.8mph (the sweet spot imo).
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    Volspeed 4

    Volspeed 4 now at over 1000 miles problem free bosch cx 2020 pre smart system. Really make emtb mode come alive. Set to 22mph. Love it!