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  • mtb gearbox (again)

    From Roger Merriman@21:1/5 to All on Thu Apr 17 21:58:50 2025
    https://www.pinkbike.com/news/praxis-unveils-a-new-folding-cog-gearbox-sea-otter-2025.html

    Praxis are having a go at one of the just around the corner technology see
    year of the Linux computer and Hydrogen cars.

    This said while for normal bikes I’m not convinced as generally gearbox’s are quite draggy, but mated to a motor ie E MTB which do eat chains and so
    on, or cargo bikes seems a better application of the technology.

    Roger Merriman

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From AMuzi@21:1/5 to Roger Merriman on Thu Apr 17 17:18:46 2025
    On 4/17/2025 4:58 PM, Roger Merriman wrote:
    https://www.pinkbike.com/news/praxis-unveils-a-new-folding-cog-gearbox-sea-otter-2025.html

    Praxis are having a go at one of the just around the corner technology see year of the Linux computer and Hydrogen cars.

    This said while for normal bikes I’m not convinced as generally gearbox’s are quite draggy, but mated to a motor ie E MTB which do eat chains and so on, or cargo bikes seems a better application of the technology.

    Roger Merriman



    Similar to the Browning-Suntour B.E.A.S.T. system from 1985:

    https://www.mtbr.com/threads/browning-transmission.817971/page-2

    Which functioned quite well but didn't sell well at all.

    --
    Andrew Muzi
    am@yellowjersey.org
    Open every day since 1 April, 1971

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Roger Merriman@21:1/5 to AMuzi on Sat Apr 19 10:52:29 2025
    AMuzi <am@yellowjersey.org> wrote:
    On 4/17/2025 4:58 PM, Roger Merriman wrote:
    https://www.pinkbike.com/news/praxis-unveils-a-new-folding-cog-gearbox-sea-otter-2025.html

    Praxis are having a go at one of the just around the corner technology see >> year of the Linux computer and Hydrogen cars.

    This said while for normal bikes I’m not convinced as generally gearbox’s
    are quite draggy, but mated to a motor ie E MTB which do eat chains and so >> on, or cargo bikes seems a better application of the technology.

    Roger Merriman



    Similar to the Browning-Suntour B.E.A.S.T. system from 1985:

    https://www.mtbr.com/threads/browning-transmission.817971/page-2

    Which functioned quite well but didn't sell well at all.

    Seems to be some discussion about function well!

    <https://www.bikeforums.net/classic-vintage/1225519-equipment-product-review-1987-browning-transmission.html>

    Number of comments about it needing maintenance frequently and that it
    didn’t like wet conditions, which in the 80’s and the rise of the MTB which are used in wet conditions hence my comments about wearing out jockey
    wheels and even the bearings/bushes.

    Roger Merriman

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From AMuzi@21:1/5 to Roger Merriman on Sat Apr 19 08:25:22 2025
    On 4/19/2025 5:52 AM, Roger Merriman wrote:
    AMuzi <am@yellowjersey.org> wrote:
    On 4/17/2025 4:58 PM, Roger Merriman wrote:
    https://www.pinkbike.com/news/praxis-unveils-a-new-folding-cog-gearbox-sea-otter-2025.html

    Praxis are having a go at one of the just around the corner technology see >>> year of the Linux computer and Hydrogen cars.

    This said while for normal bikes I’m not convinced as generally gearbox’s
    are quite draggy, but mated to a motor ie E MTB which do eat chains and so >>> on, or cargo bikes seems a better application of the technology.

    Roger Merriman



    Similar to the Browning-Suntour B.E.A.S.T. system from 1985:

    https://www.mtbr.com/threads/browning-transmission.817971/page-2

    Which functioned quite well but didn't sell well at all.

    Seems to be some discussion about function well!

    <https://www.bikeforums.net/classic-vintage/1225519-equipment-product-review-1987-browning-transmission.html>

    Number of comments about it needing maintenance frequently and that it didn’t like wet conditions, which in the 80’s and the rise of the MTB which
    are used in wet conditions hence my comments about wearing out jockey
    wheels and even the bearings/bushes.

    Roger Merriman





    Yes. The electrical switching components were the sticking
    points; the shift mechanism itself was quite robust.

    --
    Andrew Muzi
    am@yellowjersey.org
    Open every day since 1 April, 1971

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)