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  1. #1
    was fixed, now i am free
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    Dingle speed spacing

    I have a SS mtb, and want to change it to a dingle (double single) speed. This would require me to replace the bash guard with a larger outer ring on the cranks. And add another cog to the rear. To make this work correctly, i would make sure that the number of teeth was the same for both combination (ie 32x18 / 34x16 or something like that). This will go on a regular shimano freebody hub.

    Since is has been working with the inner ring and spacing on the rear cog as a ss, i would just remove the outer spacer, add a thinner, the take care of the crank thickness, add the smaller cog, then spacers to space out the rest of the cassette.

    Is this the best way to do it? If so, what would be the spacing/spacer size between the two cogs for correct chainline?



    Thanks.
    Last edited by viper_04649; 03-10-11 at 08:28 AM.

  2. #2
    Constant tinkerer FastJake's Avatar
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    Quote Originally Posted by viper_04649 View Post
    Since is has been working with the inner ring and spacing on the rear cog as a ss, i would just remove the outer spacer, add a thinner, the take care of the crank thickness, add the smaller cog, then spacers to space out the rest of the cassette.
    I can't quite make out what you're trying to say here, but it sound like you should be all set. I had an SS MTB setup as a "two speed" for a while and it worked well. I think I had 40/25 for offroad and 48/20 for on road. My horizontal dropouts were plenty long enough to accommodate the three tooth difference between the ratios. As far as spacing is concerned, just measure the distance between the two chainrings. That should be the same as the distance between your two cogs.

    Horizontal or vertical dropouts? Chain tensioner or no?
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

  3. #3
    was fixed, now i am free
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    horizontal dropouts, but i need to keep the same distance since will be using disc brakes. I am just looking for what width spacers people use. I could measure, but don't have calipers so not sure of the accuracy. Trying to find out if there is a standard width.

  4. #4
    Paste Taster Retem's Avatar
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    do a retro direct set up or get a SA kick back hub dude shred the mountain old school
    btw as long as you have enough space for the pins and plates of the chain between the cogs you should be ok
    I am dyslexic so bear with my posts.... [SIGPIC][/SIGPIC]

  5. #5
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    Chainrings are usually spaced about 5mm apart, is that what you are asking?
    I have a front brake, but I only use it for slowing or stopping.

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