1975 Sky Blue Schwinn Sports Tourer

Discussion in 'Lightweight Schwinn Bicycles' started by Schwinn499, Jan 23, 2016.

  1. #21 Posted Jan 28, 2016

    Wore out three sets of tires already!

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    i agree, I absolutely love the look (and function) of the chainguard rings on both the Nervar and TA cranksets used by Schwinn on the Sports Tourer. I was disappointed when they removed the outer guard from the crankset on the Superior.

    In addition I believe that the inner guard (between the inner and outer chainrings) was not just there for looks but also to act as a ramp to enhance shifting, especially when they were introduced in '71 with 54-36T wide-range rings. However even with the inner ramp ring Schwinn cited shifting problems across that large a gap when it replaced the 36T inner chainrings with 40T rings on the Sports Tourer late in '71.

    '71 Sports Tourer TA 54--36T crankset w/inner guard "shift ramp" ring:
    bgwlr7.jpg
    j9aw06.jpg

    '71 Sports Tourer TA 54-36T crankset w/inner guard ring removed (replaced with spacers):
    10oi6a9.jpg

    These cranksets definitely look bare without the inner guard ring. It is interesting to note that the picture of the Sports Tourer in the 1971 catalog shows it without the inner guard ring. That pic was taken in Sept. 1970 and would have been a prototype built before the inner guard ring had been added.
    1971_09.jpg
     
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  2. #22 Posted Jan 28, 2016

    I live for the CABE

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    There we go! Ill take the TA cranks over the Nervar any day. Such a nice looking crankset.
     
  3. #23 Posted Jan 28, 2016

    Wore out three sets of tires already!

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    I think most people would consider TA Pro 5 vis cranks with Cyclotouriste rings to be one of the most iconic vintage cranksets out there. However over the years the Nervar crankset has grown on me as well. The TA does have the advantage of a much greater selection of chainrings and one can much more easily make them into a triple than you can the Nervar.

    When Schwinn introduced the Sports Tourer I believe they originally intended on using only TA cranks, however due to potential supply/demand problems they quickly added Nervar as an alternative.

    From Schwinn Service Clinic Bulletin 10, March 1971:

    23tpbsx.jpg

    In 1971 it was rare to see a Nervar crankset on a Sports Tourer, but from '72 through '74 it seemed that both were used relatively equally. In 1974 the TA crankset was discontinued and only Nervar cranks were used on the Sports Tourer and Superior from '75 though '78.
     
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  4. #24 Posted Feb 7, 2016

    I live for the CABE

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    This what the Nervar looks like with a 42T replacing the original 40T pedals 007.JPG pedals 008.JPG
     
  5. #25 Posted Feb 7, 2016

    I live for the CABE

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  6. #26 Posted Feb 7, 2016

    Wore out three sets of tires already!

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    Those 90mm BCD holes were used to mount the 36T inner sprocket on that crankset for the 1971 Sports Tourer. Even after changing the ST from a 36T to a 40T inner sprocket in late '71 Schwinn continued to use up the Nervar 54T sprockets with those holes until inventory ran out well into 1972. You could use those holes to make it a triple, but good luck finding a 90mm BCD ring to match!

    Unfortunately the 42T replacement ring doesn't match up well with the inner guard/ramp designed for a 40T ring.
     
    #26 Metacortex, Feb 7, 2016
    Last edited: Feb 7, 2016
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  7. #27 Posted Sep 5, 2017

    I live for the CABE

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    Had this bike for a while now and never touched it. Forgot I even posted this thread. Finally got the new shop setup and have space and time to work on a bike for myself. Will hopefully get this project wrapped up tonight.

    6325a2638529c19806b3940ea9a14456.jpg a97cacaf314106dea8c1b51843428d80.jpg 62af79d895771ed5ceac232db2b90402.jpg
     
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  8. #28 Posted Sep 6, 2017

    I live for the CABE

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  9. #29 Posted Sep 6, 2017

    Finally riding a big boys bike

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    Your bikes are always in such nice condition. You just don't see them like that in my area.
    That one looks to be darn near a museum piece.
    The Sky Blue seems to a rather rare color on the Sports Tourer...I love it!
     
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  10. #30 Posted Sep 6, 2017

    I live for the CABE

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    I've been weeding through the crusty ones the last decade or more, I find plenty of beaters, just get lucky sometimes I guess. I had to re-spoke the wheels on this one, they were beyond bringing back. All fun stuff for me, having them turn out so nice is just the icing on the cake. Been cranking out projects to sell the last couple months. Nice to work on a keeper for myself.
     
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  11. #31 Posted Sep 8, 2017

    On Training Wheels

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    Your bike is beautiful! I'm in the process of restoring my 78 Superior that had some corrosion on the spokes. I used a brass brush which did a decent job but they don't shine anymore like new ones do. How do you know if the spokes are safe to be used after a cleaning? None of them were real rusty, just a little surface rust.
     
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  12. #32 Posted Sep 10, 2017

    I live for the CABE

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    I've heard it from both sides, some say pitted or surface damaged spokes are unsafe, but have seen and personally rode some pretty crusty wheels with plenty of faith. Personally I'd say they were plenty safe. I put many miles on the original wheels on my 77 superior, crusty spokes and all. aeff3b33fde4de1b413429f94aec7225.jpg
     
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  13. #33 Posted Sep 10, 2017

    On Training Wheels

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    I cleaned them up and have been riding it with no issues. 20170910_170136.jpg
     
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