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  1. K

    Product Review - Biktrix Juggernaut Ultra Duo 4

    Delivered Nov 2023 March 2025 report. 2400 miles Summary After considerable hassle to resolve issues, I am loving this bike. I have owned 3 e-bikes and I was excited to buy a bike that had all the features I wanted. I am sharing my experience so others can make a more informed decision when...
  2. K

    BIKTRIX Bikes and Bafang motors

    My M620 motor is exceptionally quiet at 2500 miles. I think it was a bit noisy early on, so in this case noise probably dropped off due to breaking in.
  3. K

    Ultra Tuning: Where other guides go wrong

    Has anyone run into a situation where the software tool worked fine, then would read, but not write? I have tried reinstalling program, delete/reinstall port, remove bike battery, new cable, etc. It connects and will read the file, then write box goes grey. Bike with is Biktrix Juggernaut ultra...
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