Mystery Frame... Help!

[Entobiker]

That looks like some interesting geometry. 55st-53tt??? Looks like criterium geo if so. I'd guess very late 80's to very early 90's. Id lean more towards the 90's because of the vertical dropout's. SLX (did you feel for the ridges in the seat tube and down tube?) was introduced around 1987 and wasn't really a thing by 1992 being replaced by Aluminum or oversized steel.

Where are you located? That will help with figuring out smaller builder's.

The bottom bracket and brake bridge look like a Silva brand. While not as well known as Cinelli Silva made some nice parts.

Hope this helps.

I think that geometry must have some mistakes in it.... Maybe seat and top tube the wrong way around. It would look weird with a longer seat than top tube, even in the pictures right?

So when it finally arrives (thanks Parcelforce for being useless) I will re-measure and check for the helical ridges of SLX and get back to you.

This is all very helpful though! Thanks!!

P.S. The closest thing I could find, looks-wise, is Basso, but I guess Everest may have been emulating these features as a smaller Japanese builder??

 

[grantoury]

It would look weird with a longer seat than top tube, even in the pictures right?

That is actually quite normal for a more recent road bike.

 

[sunympholepsy]

I think that geometry must have some mistakes in it.... Maybe seat and top tube the wrong way around. It would look weird with a longer seat than top tube, even in the pictures right?

So when it finally arrives (thanks Parcelforce for being useless) I will re-measure and check for the helical ridges of SLX and get back to you.

This is all very helpful though! Thanks!!

P.S. The closest thing I could find, looks-wise, is Basso, but I guess Everest may have been emulating these features as a smaller Japanese builder??

Everest is (was?) a Taiwanese framebuilding components manufacturer. Their investment cast lugs, dropouts etc. are still available to buy.

 

[Entobiker]

Everest is (was?) a Taiwanese framebuilding components manufacturer. Their investment cast lugs, dropouts etc. are still available to buy.

Ahhh ok. This makes sense. Thank you!

Omg. This makes things harder still

 

[Entobiker]

Ok, it has arrived, and the geometry is as stated (see pic below). It's is an English threaded BB.

It's got the helical ridges (super butting) at the bottom of the seat and down tube, so pretty sure it's SLX.

26.8 Seat post diameter.