3-speed fixed (bike) hub

Klaas Bil;1125439 wrote:
In addition, the usual bike set-up with a bigger chainring at the front
and a smaller sprocket at the rear, decreases the amount of torque that
a rider can exert on the thing, as compared to a direct drive when the
cranks are directly on the hub as we have on most unicycles. John Childs
hit the hammer on the nail (or so) when he wrote "It will be interesting
to see (what the specs are and) what they specify as allowable chainring
size sproket size ratios."



Its chainwheel and cog. For future reference


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SHAY_CAM

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And did you guys know switching the cog and the chainwheel around(small
in front and big in back) Creates a unique 5:1 ratio. Super easy to
pedal, but you go super fast, they call those fixie bikes.


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SHAY_CAM

Bringing back the Bmx style unicycle.
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SHAY_CAM;1126039 wrote:
And did you guys know switching the cog and the chainwheel around(small
in front and big in back) Creates a unique 5:1 ratio. Super easy to
pedal, but you go super fast, they call those fixie bikes.



a ratio that way round would be easy to pedal, but extremley slow,
infact 25 times slower than the other way round.

And a fixie refers to a hub with no freewheel or ratchet, the gearing
has nothing to do with it.

And you can't just swap gears front and back, the interfaces are
different.

And chainring and sproket are perfectly acceptable words for the
equipment we're discussing here.


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kington99

Dave

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SHAY_CAM;1126039 wrote:
And did you guys know switching the cog and the chainwheel around(small
in front and big in back) Creates a unique 5:1 ratio. Super easy to
pedal, but you go super fast, they call those fixie bikes.


Wtf??!
Were you joking????


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OneWheelLess

Seriously, the other wheel just fell off one day.
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SHAY_CAM;1126037 wrote:
Its chainwheel and cog. For future reference



Cog and sprocket are synonymous and typically refer to the rear gear.

Chainwheel and chainring are mostly synonymous. Chainwheels for the
plate style rings that BMX bikes typically use. Chainring for the more
ringlike rings that road bikes typically use.

You can doublecheck the definitions and terms at 'sheldonbrown.com'
(http://www.sheldonbrown.com/).


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The 2009 Schlumpf Speed Drive has a new clutch design that can be used
with a fixie bike. I don't see info about the new designs on the
Schlumpf web site yet. There is a brief mention at Velovision:
'Schlumpf's new drives' (http://tinyurl.com/6zeemp)

Neat stuff. I'm going to have to start thinking about a multi-speed
fixie.


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