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Bikerumor Monday Mystery Pic

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bikerumor monday mystery pic

Photo from the collection of Rustybicycle. If you think you know what this is, post your answer in ‘comments’ section– the answer will be posted there on Tuesday!

To send in your own Mystery Pic to be considered for the Monday feature, click here and attach your photo with all pertinent information.

 

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11 Comments
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ball
ball
11 years ago

Canti brake for seatstays without post bosses

Adam
Adam
11 years ago

Hard to see well in the photo…
Seat tube mount cable guide for 3 speed rear hub. Brand unknown.

Cory
Cory
11 years ago

clamp on front derailleur cable pulley (clamped to seat tube just above the BB) for a bike with top routing, typical for cyclocross.

brian
11 years ago

I second the bossless canti idea.

thor
11 years ago

Zeus front derrailleur turn around gizmo

thor

Mark
11 years ago

It’s a Simplex De-multiplicator, used often on bikes with bar end shifters to shorten the lever throw. One cable goes from the shifter to the De-multiplicator, which moves the fulcrum and activates the second cable that goes to the rear derailleur. Worked like a charm on my Alex Singer randoneur.

Mark W.
Mark W.
11 years ago

old front derailleur mount or an old after market indexer to work with friction shifters

fatboybiker
fatboybiker
11 years ago

i second the first marks comment it is a simplex de-multiplicator.

slow joe crow
slow joe crow
11 years ago

Mark was actually more right, a quick google turned up http://budgetbicyclectr.com/simplex-demultiplicator-relay.html
“A nice little cable stop that makes the shift lever actuation a little less sensitive. Never mounted, never used. “One side is connected to the right hand control lever, the other side to the rear derailleur. The purpose is to spread the movement of the lever making gear changing a positive no fumbling operation, especially on close ratio freewheels.” Mostly used with Bar end shifters.”

Mark
11 years ago

Kristibee, I used to see quite a few of them working in shops in the late 60’s and early 70’s, mostly on French bikes as you can imagine. Oops, did I just date myself?

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