Bikerumor Monday Mystery Pic

bikerumor monday mystery bicycle part

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.


Jeremiah - 01/30/12 - 7:48am

Looks like a seatpost to handlebar stem for a bike with a third wheel.

elwictor - 01/30/12 - 7:51am

Is it a repainted mid-90’s TWP mountainbike stem?

Michael-Vittoria Shoes - 01/30/12 - 8:05am

It’s a stem, just not sure since the color is throwing me off. Could be everything from Onza to Allsop/Softride. They used that color. That or AC(Adventure Components). They made a kit back in the 90’s that had a stem, crank, fork pieces, hubs. All the stuff they made and it was color coded for the three different Rock Shox colors at the time. Red, Gold and Yellow.

I am going with an AC Stem.

upsidedownbiker - 01/30/12 - 8:09am

Cinelli stem from the late 90’s.

professorVelo - 01/30/12 - 8:44am

definitely 90s, definitely a stem, almost definitely for mountain bikes… I was totally into all the innovations back then but just can’t remember someone doing cutaways from billet over the standard tubular variety ála Ringlé… plus, this doesn’t look like one of the very best in terms of machining…

ugh… not ringing any bells

Db - 01/30/12 - 9:09am

Is that forged Magnesium?

Bike Rider - 01/30/12 - 9:45am

port side blinker bearing…Where do I pick up my prize?

chris - 01/30/12 - 10:09am

Old cold forged downhill stem.
Zokes, maybe?

Jerry - 01/30/12 - 10:48am

Specialized stem.

Justin - 01/30/12 - 10:56am

The word’s heaviest bicycle stem

Ghost Rider - 01/30/12 - 11:11am

I’m with Professor Velo — I know what it’s NOT (not a Cinelli, definitely), but can’t put a finger on what it IS.

bart - 01/30/12 - 12:36pm

I bet the logo is on the other side

Frank - 01/30/12 - 2:12pm

The steer clamp looks skinny, like its for a 1″ steer tube. If you flip it over, that would put the bar clamp bolt in a typical position for a road bike stem. So I would guess it was meant for a road bike, for whatever that is worth.

kyle - 01/30/12 - 2:59pm

the world’s most phallic stem.

Irv - 01/30/12 - 4:15pm

I’d (almost) go with Db and say its a prototype (I think I can see welding by the bar clamp) for a cast magnesium stem by Kirk Precision, although think Kirk predated Aheadsets, so…… ???

matt - 01/30/12 - 5:07pm

Looks dangerous, what ever it is!

Shane - 01/30/12 - 6:27pm

Definetly Two Wheel Performace (TWP)!!

MG - 01/30/12 - 7:09pm

Its a stem!!! OR a…… stem!

Slush - 01/30/12 - 9:09pm

Nuke Proof.

Steve - 01/30/12 - 10:00pm

TRP stem, circa ’98?

Kristibee - 01/31/12 - 6:55am

Answer: bart, the logo IS on the other side, and it’s a TWP sticker. Shane and elwictor FTW!

Tim Aemmer - 01/31/12 - 10:20am


Ben Petersen - 02/01/12 - 8:18pm

Looks like a KHS Power Tools stem to me.

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