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Unknown vintage rear suspension frame parts.

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Unknown vintage rear suspension frame parts.

Old 04-23-21, 12:47 AM
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Locomotief
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Unknown vintage rear suspension frame parts.

A couple off weeks ago I couldn't resist anymore an I bought these rear suspension parts online. They kept intriguing me. I tried to find information about them but came up with nothing. I know there italian because off the word "brevettato" that mean patent. There are two other letters on the parts WJ OR CM?

the suspension is adjustable by turning a screw inside the aluminium pipe. One's find a frame to fit them on I'll use a torque wrench to adjust them both to them same setting.



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Old 04-23-21, 01:03 AM
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I would like to know more about these parts. I'm not a 100% sure they where build for a bike frame. Could be that they where made for a light moped frame. Hopefully someone knows more about these parts.

And I could use some help with finding a frame to fit these parts. I would like to adjust a frame to fit these parts on. I need a frame with a horizontal rear fork with a inside diameter of 13 mm. The outside diameter is probably something around 15 mm. The vertical fork is easier to make so I'm not to worried about that. So if there are people with a bike collection and a gauge and some time to spare I would love to know what kind of frame I should look out for .
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Old 04-23-21, 05:44 AM
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Interesting! No room for a derailleur! first time seeing these.
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Old 04-23-21, 11:08 AM
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At the very least you'll want to run a SOLID rear axle, a full 10mm and not 3/8" or 9.5mm.
A Phil hub might be the one to use here.

It's still going to tend to be an axle-breaker with that design, not to mention that the wheel won't much stay in-plane with each end of the axle supported on it's own independent suspension link.

Horrible design imo, since the axle simply can't provide much torsional resistance to prevent independent movement on each side, and which might preclude use of a rear brake unless it's mounted on the chainstays.

Last edited by dddd; 04-23-21 at 11:12 AM.
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Old 04-23-21, 11:31 AM
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I wonder how the rear brake would work? If the wheel moves independent of the rear tringle you couldn't have traditional calipers or cantilevers. It Must be a drum brake with a floating arm. That would seem to imply some form of utility bicycle.
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Old 04-23-21, 02:00 PM
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Totally possible it is to a motorized bicycle. Italy had a lot of them!

I don't blame you for the purchase. I also find them fascinating.
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Old 04-23-21, 02:06 PM
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You would be shocked at how "delicate" these things were!
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