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1981 Schwinn Sierra Mountain Bike

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1981 Schwinn Sierra Mountain Bike

Old 07-30-17, 07:51 PM
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1981 Schwinn Sierra Mountain Bike

Hello,
I saw an inquiry about early Schwinn Mountain bikes made in Chicago. I have a 1981 Schwinn Sierra 18 speed mountain bike. My high school buddy bought this bike new in 1981. He sold it to me and bought a Canondale.
The serial # on my bike is GS723639. It has a Chrome moly frame. It is all original except for the tires, grips and seat. It is the original paint color red.
I am pretty sure it was built in Chicago. Also, anyone out there familiar with a Schwinn Cruiser 1961 with dual twin straight bars. It is not a double bar.
Any info would be greatly appreciated.

Gary
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Old 07-30-17, 08:26 PM
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Old 07-30-17, 10:15 PM
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No picture and I did not check the number but I believe the first Sierra mountain bike schwinn sold was in 83 and it was made in Chicago. I think your bike is 84 or later and made by Giant. There were earlier Sierras made in Chicago but they were not mountain bikes.
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Old 07-31-17, 01:02 PM
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Originally Posted by Gferbikes
Hello,
I saw an inquiry about early Schwinn Mountain bikes made in Chicago. I have a 1981 Schwinn Sierra 18 speed mountain bike. My high school buddy bought this bike new in 1981. He sold it to me and bought a Canondale.
The serial # on my bike is GS723639. It has a Chrome moly frame. It is all original except for the tires, grips and seat. It is the original paint color red.
I am pretty sure it was built in Chicago. Also, anyone out there familiar with a Schwinn Cruiser 1961 with dual twin straight bars. It is not a double bar.
Any info would be greatly appreciated.

Gary
Gferbikes
Most any Schwinn ATB would have not been made in Chicago. Which is actually pretty good. The Chicago bikes were generally heavy, hi-ten steel; the major exceptions being the Super Sports, Sports Tourers and Paramounts.

If a Schwinn MTB/ATB has a G serial number, that generally means made in Taiwan by Giant.

@T-Mar or @Metacortex can probably tell you more- just by your S/N
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Old 07-31-17, 01:20 PM
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S/N is Giant format, indicating weeks 37-38 of 1987, so almost certainly a 1988 model.
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Old 07-31-17, 02:44 PM
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Originally Posted by Gferbikes
I saw an inquiry about early Schwinn Mountain bikes made in Chicago. I have a 1981 Schwinn Sierra 18 speed mountain bike. My high school buddy bought this bike new in 1981. He sold it to me and bought a Canondale.
The serial # on my bike is GS723639. It has a Chrome moly frame. It is all original except for the tires, grips and seat. It is the original paint color red.
I am pretty sure it was built in Chicago.
There was no Sierra ATB from Schwinn in '81. As others have stated above that model first appeared in '83 as a Chicago built bike and in '84 and later as a Giant built model made in Taiwan. If you want to know more please post clear pics of the bike (drive side), the frame serial number as well as the tiny 4-digit number stamped in the headbadge. The latter is the most important as it will indicate the day the bike was built.

Also, anyone out there familiar with a Schwinn Cruiser 1961 with dual twin straight bars. It is not a double bar.
I think you are talking about a late '61 Skipper: https://thecabe.com/forum/threads/he...r-model.85818/
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Old 02-10-18, 01:44 AM
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Gferbikes
Hi
I read your SN as having 2 letters GS and 6 numerals. The Giant numbers in the early 80`s had only one G to indicate Giant and 4 numerals eg 'G0181' and equates to "Giant, January, 1981".
After 1987-1989: GFyxxxxx, again your SN does not fit the accepted system.
Where is the SN located, Stem or rear bracket, post a photo if you can.
Try the Schwinn Look up tool
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