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  1. #1
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    Suntour VX-S rear derailleur help please

    I have a 1981 Miyata 710 with a Suntour VX-S rear derailleur. I need to replace this derailleur since it is broken. Will any Suntour rear derailleur work with this 6 speed rear wheel? Someone said I should only get a bolt on derailleur. Aren't they all bolt on? Thanks in advance for your help

  2. #2
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    Assuming you have friction shifting, any Sun Tour, Shimano, SRAM or Campy rear derailleur will work. There is nothing special about 6-speed. Some of the newer 9 and 10-speed rear derailleurs may have a problem if you use the wider 6 or 7/8-speed chains.

    The advice to get a "bolt on" derailleur was probably intended to mean you need a derailleur that bolts directly to the built-in hanger on the frame's rear dropout, not a derailleur with a separate "claw" mount. All good quality rear derailleurs are "bolt-on"

  3. #3
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    Thanks for your help. I was told Taht I have ratcheting shifters. Are these friction?

  4. #4
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    Thanks for your help. I was told that I have ratcheting shifters. Are these friction?

  5. #5
    Senior Member
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    Quote Originally Posted by Unicornz0 View Post
    Thanks for your help. I was told that I have ratcheting shifters. Are these friction?
    Yes, they are Sun Tour "Power Ratchet" shifters, probably the best friction shifters ever made.

  6. #6
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    Thanks HillRider, since I am currently unable to find the original rear derailleur, which do you suggest and why?

  7. #7
    Senior Member
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    Quote Originally Posted by Unicornz0 View Post
    Thanks HillRider, since I am currently unable to find the original rear derailleur, which do you suggest and why?
    Sun Tour (the original company) is out of business and has been for many years.

    Any Shimano rear deraileur should be a good replacement. At a reasonable price point, consider either a Tiagra (road) or Deore LX (MTB). Both will work well and the LX will give you more gearing options as it will clear up to a 34T rear cog.

  8. #8
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    Thanks again HillRider. Now I will start looking for a replacement.

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