I think 26.8 is right. My 1993 steel stumpjumper is 26.8, and your picture shows a very similar (identical?) looking frame.

I think 27.2 might be a newer standard, or perhaps more common with aluminum frames.

 

Taking for granted that no one would identically reproduce a stock paint job, which it is pretty obvious of, and take that it does appear to be scratched, I'd say it is probably a Stumpy. Don't know the vintage, as you stated, but my wife's '93 Rockhopper takes a 26.6 post. Your LBS should have a sizing tool to find out what it really is sized for. Now, I'm no expert of entire model lines, but I really don't remember seeing a color like that anytime recently. I'd guess it is somewhere near '93 or earlier. It also appears to accept a 1" steerer...that dates it to at least '93. You seem to find some pretty good gems, regardless of the condition. I wish I lived where that happened often. I did, however, see a pretty old Schwinn the other day. So old that it was chromed at both dropouts and the BB shell. Didn't get a chance to chat the guy into selling though, darn it.

 

Found a picture of a 92 Stumpjumper.

Taking for granted that no one would identically reproduce a stock paint job, which it is pretty obvious of, and take that it does appear to be scratched, I'd say it is probably a Stumpy. Don't know the vintage, as you stated, but my wife's '93 Rockhopper takes a 26.6 post. Your LBS should have a sizing tool to find out what it really is sized for. Now, I'm no expert of entire model lines, but I really don't remember seeing a color like that anytime recently. I'd guess it is somewhere near '93 or earlier. It also appears to accept a 1" steerer...that dates it to at least '93. You seem to find some pretty good gems, regardless of the condition. I wish I lived where that happened often. I did, however, see a pretty old Schwinn the other day. So old that it was chromed at both dropouts and the BB shell. Didn't get a chance to chat the guy into selling though, darn it.

Go here and scroll about 2/3s of the way down. This guy has a 1992 Stumpjumper that has the same frame and stem as yours.

http://vintagemtbr.tripod.com/id34.html

Brian

 

One more thing.

Go here and scroll about 2/3s of the way down. This guy has a 1992 Stumpjumper that has the same frame and stem as yours.

http://vintagemtbr.tripod.com/id34.html

Brian

I have a 1994 Steel Stumpjumper and it has a 26.8 seatpost.

Brian

 

Go here and scroll about 2/3s of the way down. This guy has a 1992 Stumpjumper that has the same frame and stem as yours.

http://vintagemtbr.tripod.com/id34.html

Brian

Uhm, Brian, don't know how to tell you this, but the pic in your link (at Built4Speed's website) is Built4Speed's bike...the same one that he posted in this thread. Hmmm, intriguing don't you think.

 

Go figure.

Uhm, Brian, don't know how to tell you this, but the pic in your link (at Built4Speed's website) is Built4Speed's bike...the same one that he posted in this thread. Hmmm, intriguing don't you think.

I just did a quick google search and that was the first site I found that had a picture of an early 90's Stumpjumper. The crank is different on the bike and I did not see his name anywhere on the page, so I did not even imagine that it would be the same bike.

Brian

 

Yep,same bike.Different crank...

Ha ha. I guess my site is out there after all. Thanks for the help guys.Ok,I checked my bikes out this afternoon,my '83 Stumpy has a 26.4mm post,my '87 Stumpjumper Team has a 26.8mm, My '93 Stumpy had a 26.8mm post,steel frame with a threadless 1" steerer...yeah,that sounds about right.My first five Rockhoppers,starting with a 1989 model, all had 27.2mm posts,including my current ride,which is a 1995 steel frame with a 1" threaded steerer.My '88 Rockcombo has a 26.8mm. I always thought the higher-end bikes use the 27.2mm posts.
Some people collect Yetis and Ritcheys, I collect Stumps and Rockhoppers.I'm a Specialized bimbo.