That's not my bike, you'd have to ask @Karate Chicken Industries for details.
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What about this little beauty
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Slingshot
A bike that needed some upgrades. Had this for a while but was 50/50 on parts around the bike. Some XT, some XTR and some low end stuff. All M900 now and a nasty sounding Ringle hub in the rear, front matching. I do have the original Halson for the bike but it needs a rebuild so the Mag is in...
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But this one, nos ceramic mavics!
theradavist.com
Readers’ Rides: Rokus’ Specialized Stumpjumper by Studio ROOK
Today's Readers' Rides comes from Rokus in Rotterdam, who submitted his Specialized Stumpjumper that was built up by Studio ROOK. I know people love these old Stumpy frames and Rokus did a great job detailing the parts list with a succinct story about where he got this bike. Read on below for...
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Because my brother ordered and bought the bike brand new in 1985. Anaheim Schwinn assisted him on the build and he went all-out. It lived most of its life hanging in various garages. Because the branding/decals were applied after the clearcoat, they faded away over the years. I have Schwinn Authorized replacement decals that accurately match the old pics he has of it. The only original sticker on the bike is a small "Made In Japan" near the bottom of the seat tube.
Hi
I have one of these same frames with a Serial number BS367823. By this Serial number it was made in 1981 but others say 1983 due to the Asian Serial number Guide. Schwinn use the B=month and S= 1981 but the ASNG say B=month S= Asian made and 3 = year. I consider both can be right but Schwinn did use S for 1981. I have seen only a small number of the frames. with only 3 and 4 being the first numbers. The serial number on these frames being the Schwinn format that was used in 1981 I feel it would have not been used by Schwinn again in 1983 or 1985 as it would have have serial number legality issues for Schwinn of issuing the same number again for both years.
I refer you to another forum https://www.bikeforums.net/classic-vintage/376857-id-lugged-schwinn-mtb-frame-3.html for a long standing discussion. and this one
I recently viewed a Specialised Stumpjumper of 1982 that is almost the same as these frames
I am still crumbling
I have one of these same frames with a Serial number BS367823. By this Serial number it was made in 1981 but others say 1983 due to the Asian Serial number Guide. Schwinn use the B=month and S= 1981 but the ASNG say B=month S= Asian made and 3 = year. I consider both can be right but Schwinn did use S for 1981. I have seen only a small number of the frames. with only 3 and 4 being the first numbers. The serial number on these frames being the Schwinn format that was used in 1981 I feel it would have not been used by Schwinn again in 1983 or 1985 as it would have have serial number legality issues for Schwinn of issuing the same number again for both years.
I refer you to another forum https://www.bikeforums.net/classic-vintage/376857-id-lugged-schwinn-mtb-frame-3.html for a long standing discussion. and this one
Both I have contributed to but the Alternative Schwinn goes back earlier to 2006 where I used one less and a name.
I recently viewed a Specialised Stumpjumper of 1982 that is almost the same as these frames
I am still crumbling
Hey Karate Chicken Industries,
Is it possible to state the Serial number as on the frame. It will help with determining the year. There is no need to give the full number you may have some security issues but to know the first two letters and the first 2 numbers and how many numbers there are. My frame is BS3667823 but express as BS36nnnnn.
I know my view is against the ASNG format as it is not completely proven to match these frames as Schwinn has stated from 1965 that B= February and S = 1981. I have asked Bianche for a description of the SN format on the Asian made frames and they do not know what is is or who made the frames but it is proven Schwinn did use S for 1981.
I have a copy of the Schwinn ATB Owners Operating Manual for a frame of 1982 that is stamped GT502469 as the Serial number with a Final inspection date 266 82 and the frame is a SW1-9 that complies with a 1982 build and completion. It is quite common for the Serial Number date to be years different from the completion date as the Serial Number is stamped at the beginning of the frame manufacture. Do you have the original forks for your frame. These ATB frame never came with a final inspection stamp on the head badge.
Is it possible to state the Serial number as on the frame. It will help with determining the year. There is no need to give the full number you may have some security issues but to know the first two letters and the first 2 numbers and how many numbers there are. My frame is BS3667823 but express as BS36nnnnn.
I know my view is against the ASNG format as it is not completely proven to match these frames as Schwinn has stated from 1965 that B= February and S = 1981. I have asked Bianche for a description of the SN format on the Asian made frames and they do not know what is is or who made the frames but it is proven Schwinn did use S for 1981.
I have a copy of the Schwinn ATB Owners Operating Manual for a frame of 1982 that is stamped GT502469 as the Serial number with a Final inspection date 266 82 and the frame is a SW1-9 that complies with a 1982 build and completion. It is quite common for the Serial Number date to be years different from the completion date as the Serial Number is stamped at the beginning of the frame manufacture. Do you have the original forks for your frame. These ATB frame never came with a final inspection stamp on the head badge.
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Karate Chicken Industries
Hi again,
I don't wish to be persistent but I would appreciate what I have asked for regarding the Serial number. I understand your brother had the frame in 1985 but along with what else is written the number on my frame BS36nnnn is recognised as 1981. The Schwinn SN format did change in around 1984 when the Chicago factory closed. There is no head badge number, common to all these frames as Schwinn did stamp the serial number at the time of manufacture starting and the had a final completion number on the head badge when the frame was completed. I know there is some confusion with the ASNG where letter, S and first number indicate Month, S Asian made, and year made and I agree that did exist but the Schwinn SN number format is recognised by many including Schwinn as existing but the ASNG SN is not recognised by Bianche as a SN they used or can they give a Manufacturers or an Asian Country. These frames where refuted to have been supplied by the Schwinn sales team through retail outlets similar to your situation. In my view the Schwinn and the ASNG look the same and can be read as being correct in either view point but Schwinn did have one month letter not being used and one additional letter different than the ASNG as well as the month letter corresponding with the first number of a sequential serial number. These frame where advertised in 1983 and later but for that the frame had to exist in 1982 as the 1983 catalogue was the 1982 Christmas sale catalogue that was put together in August 1982. I am not looking for when the frames where first sold but for when they where stared to be made.
crumbling
Hi again,
I don't wish to be persistent but I would appreciate what I have asked for regarding the Serial number. I understand your brother had the frame in 1985 but along with what else is written the number on my frame BS36nnnn is recognised as 1981. The Schwinn SN format did change in around 1984 when the Chicago factory closed. There is no head badge number, common to all these frames as Schwinn did stamp the serial number at the time of manufacture starting and the had a final completion number on the head badge when the frame was completed. I know there is some confusion with the ASNG where letter, S and first number indicate Month, S Asian made, and year made and I agree that did exist but the Schwinn SN number format is recognised by many including Schwinn as existing but the ASNG SN is not recognised by Bianche as a SN they used or can they give a Manufacturers or an Asian Country. These frames where refuted to have been supplied by the Schwinn sales team through retail outlets similar to your situation. In my view the Schwinn and the ASNG look the same and can be read as being correct in either view point but Schwinn did have one month letter not being used and one additional letter different than the ASNG as well as the month letter corresponding with the first number of a sequential serial number. These frame where advertised in 1983 and later but for that the frame had to exist in 1982 as the 1983 catalogue was the 1982 Christmas sale catalogue that was put together in August 1982. I am not looking for when the frames where first sold but for when they where stared to be made.
crumbling
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I'm not all about all of that, it's just a bike.
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Dragged this one home with me last eve. Gave it a servicing and cleaning today. 82 Sidewinder
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That's minty! Chrome and blue Anno is so good
Finally getting back to this. Since the drivetrain componentry is all Deerhead, the Sansin hubs are getting swapped out with 1985 Deerhead. While the rims are unlaced, the Ukai box rims are getting restored.
Since I've been chipping away at this particular stone a bit lately and @crumbling was so persistent, here's a bit more of the mystery Schwinn MTB Frameset that was Made In Japan.
I was hesitant to post up any identifier details to keep any scammers at bay because this bike is obviously rare and when completed, worth a pretty penny. My hesitation dissipated when I found the owner's manual and receipt, which is complete provenance of ownership and thusly an effective deterrent from any attempted scumbaggery.
I was hesitant to post up any identifier details to keep any scammers at bay because this bike is obviously rare and when completed, worth a pretty penny. My hesitation dissipated when I found the owner's manual and receipt, which is complete provenance of ownership and thusly an effective deterrent from any attempted scumbaggery.
Great vid...cool bike! 
