Can Too High Gears be Lowered on SRAM Dualdrive?

[Dave Larrington]

In news:[email protected],
bugbear <bugbear@trim_papermule.co.uk_trim> tweaked the Babbage-Engine to
tell us:
> Dave Larrington wrote:
>> In news:[email protected],
>> Peter Clinch <[email protected]> tweaked the Babbage-Engine to
>> tell us:
>>> Artemisia wrote:
>>>> Peter Clinch wrote:
>>>>
>>>>> It's worth noting that this is only a problem on /seriously/ steep
>>>>> hills (see http://en.wikipedia.org/wiki/Koppenberg). But with
>>>>> muddy tracks it's quite easy to run out of traction. At which
>>>>> point you get off and push...
>>>> My hill is seriously steep.
>>> How seriously? Koppenberg is famously difficult for
>>> /professionals/. What's the actual gradient? There should be no
>>> trouble with traction on a typically surfaced 20% hill, and those
>>> are very unusual.
>>
>> Koppenberg is about 20%; the problem is that there is sand between
>> the cobblestones, so if the rear wheel gets into a longitudinal gap,
>> you are stuffed. I've done 25% a few times, most notably Bushcombe
>> Lane:
>
> Longstaff "double drive" sounds helpful here.

Not if the trike in question is a recumbent with a single rear wheel, thobut


I've got a Ken Rogers upright trike with 2WD, but have yet to use it in
anger, on account of it having no brakes.


--
Dave Larrington
<http://www.legslarry.beerdrinkers.co.uk>
External Transparent Wall Inspection Operative.

 

[Alan Braggins]

In article <[email protected]>, Dave Larrington wrote:
>bugbear <bugbear@trim_papermule.co.uk_trim> tweaked the Babbage-Engine to
>tell us:
>> Dave Larrington wrote:
>>>
>>> Koppenberg is about 20%; the problem is that there is sand between
>>> the cobblestones, so if the rear wheel gets into a longitudinal gap,
>>> you are stuffed. I've done 25% a few times, most notably Bushcombe
>>> Lane:
>>
>> Longstaff "double drive" sounds helpful here.
>
>Not if the trike in question is a recumbent with a single rear wheel, thobut
>

That depends on whether the single rear wheel is the (only) driven one
http://www.eland.org.uk/s327.html
http://www.trike.ru/en/english.phtml