Bike Forums - double freewheel double drive fixed

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Quote:

Originally Posted by Wil Davis

That's exactly what you hear with the old Sturmey-Archer 3-speed hub-gears† when in the higher gear. From what I remember, direct-drive is the 2nd gear of the 3 and when you're in the 3rd (high) gear, the planet-gear carrier is being driven by the input cog (the one the chain is on), the sun-gear is fixed (to the axle/frame), and the annular-gear (connected to the hub/wheel) is being driven at a higher angular rate than that of the input cog, and the clicking you're hearing is in fact the free-wheel…

(God, I haven't seen the inside of an SA hub since I took one apart about 40 years ago - all the above is from memory…)

- Wil

† hub-gears - such wonderful devices, beautiful, elegant, no external bits to break off - just make sure you add a few drops of sewing-machine-oil (3-in-1) to the little oiler cap (remember those?) regularly…

Man, I love the ticking of my 3-speed in high gear. It's like a little reward for pushing that gear.

maybe it's just me, but if you really want a high gearing that you can skid in, why not just rig up a coasterbrake? you could set it up with some crazy steep gearing, but you'd always be able to bust the skid.

Maybe because he wants to ride FIXED ?

It'd be easy to skid a singlespeed with disc brakes, too...

Which brings me to the conclusion we somehow managed to overlook so far: a double freewheel with different gear ratios on the two sides would NOT be fixed :eek:
It would allow pedaling anywhere between the cadences of the two freewheels, both coasting.