Re: mtb gearbox (again)

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