yes, I'm a ss wanna-be- Mtbr.com
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  1. #1
    surly inbred
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    yes, I'm a ss wanna-be

    posted this over on the general forum..

    over here...


    as a side bar, I took apart an old Xt ('98 'ish) crankset tonight to remove the small & large rings, but found the bolt & bushings would not seat tightly on the 32 tooth afterwards.. are there spacers available? what do folks use to set up the front ring?

    thanks,
    ~mud

  2. #2
    Ride More
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    You could get new chain ring bolts for a couple of bucks at your LBS. Another option is to put a bash ring on the crank. This would take up the space that the big ring normaly takes up. Sinec you want to save money, I would stick with the bolts.
    Andrew

  3. #3
    Nat
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    Quote Originally Posted by muddog999
    posted this over on the general forum..

    over here...


    as a side bar, I took apart an old Xt ('98 'ish) crankset tonight to remove the small & large rings, but found the bolt & bushings would not seat tightly on the 32 tooth afterwards.. are there spacers available? what do folks use to set up the front ring?

    thanks,
    ~mud
    The stock c-ring bolts had three layers to hold together: big ring, spider arm, middle ring. Now that you've removed the big ring you've removed a layer, so the bolts are too long. You need short bolts such as these single bolts:

    http://www.webcyclery.com/home.php?cat=302

  4. #4
    surly inbred
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    Quote Originally Posted by Nat
    ... You need short bolts such as these single bolts:
    Thank you kind sirs...

    wasn't sure what was available aftermarket.

    Now if I could only figure out this horizontal vs vertical dropout bit... I just don't see the diff if there's no change in "effective" chain length. Why can't I just swing a shortened chain around a 32-16 (with spacers) with no concerns? Am I missing something?

  5. #5
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    If you really want to save some money (and perhaps some time), you could do like I did and file away at the existing too-long chainring bolts until they're no longer too long.

    The issue with chain length has to do with the fact that you can only add/remove an inch of chain at a time. This is not very fine adjustability, so most gear ratios will result in too loose of a chain. Then, once you find that perfect ratio, you can't just add/subtract 2 teeth (one inch) at a time, because the diameters of the cogs change non-linearly with the number of teeth (circumference), giving the chain slightly longer/shorter runs.

  6. #6
    surly inbred
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    My first thought was to head for the grinder... I just get nervous about botching threads.

    so I found this link tonight... should solve the single cog issue, but if I may... what determines the right chain length, ie... need for a tensioner?

    spacers
    Last edited by TroutBum; 01-16-2005 at 09:05 PM. Reason: bunk url...

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