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Gear head

Old 11-17-17, 07:36 PM
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Gear head

I hijacked this off FB . I have no idea .
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Old 11-25-17, 12:43 AM
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I'm inclined to think it's a photoshop job. Think about where the chain-line would be if there was a chain. Those gears shouldn't mesh face to face the way they do. Besides, where's the left crank-arm?

Or is there an optical illusion?

Last edited by rollagain; 11-25-17 at 12:47 AM.
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Old 11-25-17, 06:46 PM
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see it but with multiple gears.
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Old 11-29-17, 12:36 PM
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Scroll down on this page, second or third image:
Chainless Bicycle Adverts & Pictures Chainless Bicycles ? Shaft-Drive, Acatene, Cardan
I think it's a real bike, at least the idea is somewhat feasible.
Getting any kind of little pebble or stone in there would just lock the thing up, it lacks the flexibility of a chain system.
The rear axle would need to be very firmly set in a definite location, unlike chain-drive bikes which can operate with more or less chain distance.
I would think lubrication would be a bigger issue than with chains. Or more to the point, you'd be replacing gears periodically rather than chains.
Walking or riding over a curb would bang the gears up.
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Old 12-01-17, 04:43 PM
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I had something like it on my SAT test in the mid 60's..
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