W
Willy Smallboy
Guest
I am handicapped and I want a very low gear to use when going up a
mountain with loaded bags. I have used a 20t front and a 34t rear and
it is NOT low enough for me. I think this would be low enough:
a Schlumpf Mountain-Drive front (40% reduction) with a 17t
front gear and a SRAM Dual Speed Drive (73% reduction) rear
with a 34t rear gear. I figured this would go about 10
inches per one pedal revolution. (Using Schlumpf's Excel
spreadsheet)
BUT it seems this cannot be done. SRAM seems not recommended
for loaded touring (they say no tandems or delivery bikes).
I think Mountain-Drive's lowest gear is 27t. So now I think
I can do this:
Front 27t with a Moutain-Drive (Schlumpf said this is equal
to a 11t gear) and a 34 rear. Schlumpf says that this is too
low and I would fall off the bike. I think I can pedal about
40 rpm. Does anyone know in MPH how fast this is (I know it
might be slower than walking but walking and pushing my bike
is harder on my bad leg than pedalling). And with low center
of gravity and heavy bags would I fall over? My gut feeling
is I would not. I have gone very slow with my old set up.
Does anyone have this setup?
If you ever see someone pedalling like crazy and going very
slow that might be me.
mountain with loaded bags. I have used a 20t front and a 34t rear and
it is NOT low enough for me. I think this would be low enough:
a Schlumpf Mountain-Drive front (40% reduction) with a 17t
front gear and a SRAM Dual Speed Drive (73% reduction) rear
with a 34t rear gear. I figured this would go about 10
inches per one pedal revolution. (Using Schlumpf's Excel
spreadsheet)
BUT it seems this cannot be done. SRAM seems not recommended
for loaded touring (they say no tandems or delivery bikes).
I think Mountain-Drive's lowest gear is 27t. So now I think
I can do this:
Front 27t with a Moutain-Drive (Schlumpf said this is equal
to a 11t gear) and a 34 rear. Schlumpf says that this is too
low and I would fall off the bike. I think I can pedal about
40 rpm. Does anyone know in MPH how fast this is (I know it
might be slower than walking but walking and pushing my bike
is harder on my bad leg than pedalling). And with low center
of gravity and heavy bags would I fall over? My gut feeling
is I would not. I have gone very slow with my old set up.
Does anyone have this setup?
If you ever see someone pedalling like crazy and going very
slow that might be me.