Bikerumor Monday Mystery Pic

bikerumor monday mystery pic

Photo from the collection of Jeff Archer of First Flight Bicycles. If you think you know what this is, post your answer in the ‘comments’ section– the correct 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.


Sean - 11/12/12 - 8:00am

Old Rotor cranks that did funny things with timing?

Doubt it, after looking further at it.

Kris Hicks-Green - 11/12/12 - 8:05am

MMC (Magic Motorcycle Components) crank?

Ripnshread - 11/12/12 - 8:25am

Bullseye cranks?

Kris Hicks-Green - 11/12/12 - 8:45am

Not MMC. Cyclone? Arm shape is about right, but the spider is a little different than the version I’ve seen.

jud - 11/12/12 - 9:28am

white industry crank and b.b. .

Iowa Cyclist - 11/12/12 - 10:01am

Ahh, the Campy Frame Extender, circa 1982. Am I right?!?

Gordon - 11/12/12 - 10:29am

That is a good mystery pic. I was thinking Prototype Action-Tec crankset and BB? Or a Gonzo Ti Bb and crank?

Luke - 11/12/12 - 10:39am

Look like Bullseye cranks to me.

Your Face - 11/12/12 - 10:55am

Campy Seatpost.

O'school - 11/12/12 - 10:58am

Dan/Ed cranks. Ahead of their time. I think they even had a belt drive too

kurti_sc - 11/12/12 - 1:17pm

daggone it! I saw these once when I was looking at a new crank system for Icon. The spindle shape was perfect and replicated beam loading from a textbook point of view. I can’t stress my brain enough to find the right cells with the answer. Beer probably washed them away, anyway. I’m thinking McMahon or something like that. When do we get the answer?

Nick C - 11/12/12 - 2:41pm

fo sho DanEd with a big ol’ U.S.A. machined on the outside. and a nice bb conversion and hexagonal spindle to arm interface.

Ripnshread - 11/12/12 - 2:49pm

What is with the bb? How does it attach to a frame? 2

ant1 - 11/12/12 - 3:04pm

1950s campy track seatpost, to be exacter.

Jeff - 11/12/12 - 4:26pm

Belt drive version @

Chris S. - 11/12/12 - 4:36pm

Is there a chance that it could be a Mrazek …. I recall that they also made a machined SS and alu crank … but I would have to surf through my mid 90’s editions of MTB Action to be sure.

E. N. Gineer - 11/12/12 - 6:02pm

@kurti_sc: And the pockets in the crank arms precisely coincide with the highest stressed area XD

Gillis - 11/12/12 - 6:28pm

prototype raceface crankset

Kristibee - 11/13/12 - 7:14am

Answer from Jeff at First Flight Bicycles: “Dan/Ed or Dan-Ed Crank, first names of the guys who owned the company.” Also, see his link (jeff’s comment above) for the belt-drive version.

Jed - 11/15/12 - 7:36am

It’s a potatooooo!

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