Bikerumor Monday Mystery Pic

bikerumor monday mystery pic first flight bicycles mombat

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.


Reformed Roadie - 03/25/13 - 7:08am

Mavic Bottom Bracket…no threads required…perfect for frames with cross-threaded BB.

Kelly Smith - 03/25/13 - 7:26am

Yes I agree, Mavic Bottom Bracket for shells with stripped or damaged threads.could also adjust chain line.Great Mavic Quality.

Parkcyc - 03/25/13 - 7:27am

Mavic 610 bottom bracket. Needed a specific chamfering tool so it could be used and installed properly. I still have one and the tools. Worked beautifully but weighed a freaking ton!

huelse - 03/25/13 - 7:33am

Mavic 616 R.D. bottom bracket

Wingnut - 03/25/13 - 8:14am

Mavic…but the cups are on backwards….

Your Face - 03/25/13 - 8:32am

I swear we have already have had this.

Your Face - 03/25/13 - 8:34am

Yup, right here; I am sure it is a slightly different model, but same company and era.

joby - 03/25/13 - 8:45am

Mavic BB; needs special chamfering tool to cut the shell in order to seat the black bushings on the ‘cups’.

NASH - 03/25/13 - 9:02am

Not a mystery pic as it was posted already.

Fatboy - 03/25/13 - 9:36am

hydraulic dropper for Campy seatpost

jud - 03/25/13 - 9:40am

mavis early version of press in, almost. Usually used back in the day when a mechanic strips your threads in the b.b. .

spokejunky - 03/25/13 - 9:46am

Thought this one looked familiar.

Cykelposten - 03/25/13 - 10:30am

Only available in ISO taper so not a good repair solution unless you ran Campag….. Am running 3 of these – all on Mavic cranks though…. .

Cykelposten - 03/25/13 - 10:31am

Wingnut – cups aren’t on backwards – it’s the MTB version which was wider so would fit 73mm shells.

Cykelposten - 03/25/13 - 10:32am

Actually from photo looks like it has 1 MTB lockring and one road lockring. What’s the story there?

Laurens - 03/25/13 - 10:42am

Yeah, Mavic’s old BBs – I still have one mounted in an old Trek 8700 frame, alloy/carbon from 1991.
Damaged the BSA thread on that frame, so the Mavic was the only solution after that.
Wish they’d still make those rather than helmets and stuff.

Matt - 03/25/13 - 11:44am

On a similar vein, is there currently any way to run a square-taper crankset in a pressfit frame?

royalewithcheese - 03/25/13 - 12:27pm

@Matt, there are aluminum sleeves with BSA threads that you can press into a BB30 frame with a headset press, they aren’t easy to get out if you ever decide to run a BB30 crank though.

Rick Jacobson - 03/25/13 - 1:05pm

Yup, it’s a Mavic BB. I have one on my 1983 KHS Professional. Swapped the original Superbe Pro Crank for the lighter, stiffer, and oh-so beautiful Mavic Crankset. The bike currently runs on the original derailleurs and brakes, Shimano 7sp shifters and freewheel, Campy Record hubs and seatpost, and Modolo brake levers. And yes, the all play well together!

Your Face - 03/25/13 - 2:41pm

So Rick, you’re running a campy seatpost. Nice.

MAvic - 03/25/13 - 3:56pm

Mavic’s worst invention ever. An anuglar pressure fit bb that required you to mill your frame to accept it. I had to use green loctite all the time on mine to keep it from moving under extreme loads. The only good thing about that BB was the ability to dial in the chainline.

greg padley - 03/25/13 - 3:58pm

Great BB! Now who has the shop tool kit from Mavic for chamfering the bottom bracket shell, adjusting the hubs, removing and installing the sealer cartridge bearings from these wonderful parts? Yea, that would be me!

Matt - 03/25/13 - 5:51pm

Lesson I learned the hard way. If your PF shell isn’t perfectly round, then there’s no way for the aluminum shell to fit into it.

…but not being perfectly round it kind of the whole point of pressfit. You can be slightly off and PF still works find. Would love to find a non-permanent solution for a pressfit squaretaper.

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