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  1. JcoolMTB

    Volspeed tuning box for Bosch gen 4

    I still have the old Purion. I was talking about having modes with more assistance and they are kind of between in the stock modes. I can switch tuning ON/OFF. So I can have modes like: ECO(60%), ECO+(80%), TOUR(120%), TOUR+(150%),EMTB(210%), EMTB+(230%), TURBO(300%) and TURBO+(310%). The tuning...
  2. JcoolMTB

    Volspeed tuning box for Bosch gen 4

    I had time to test the Volspeed V4 more. For example, with eco mode, I can now accelerate naturally up to 25 km/h. A huge improvement indeed. 20% increase in the assistance level is really good! The same improvement is also in the other modes. The outdated Purio system was practically...
  3. JcoolMTB

    Volspeed tuning box for Bosch gen 4

    I have not changed the motor or battery to more more powerful, right? I don't see any issues in here and the tuning is OFF (or locked) by default. I'm not riding on the public roads with the tuning ON and they can't switch it ON either, simple is that. The bike still passes all the tests (speed...
  4. JcoolMTB

    Volspeed tuning box for Bosch gen 4

    I just installed the Volspeed V4. It was very tight fit under the Trek Rail's 7 (gen 2) bash plate. Working great so far and I love 20% more assistance levels when the tuning is ON! I also tested the Dynamic and Alternative modes, they are great! Now I have a choice to select stock or increased...
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