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I have a Raleigh maybe 8 years old with shimano 15 gears. How do I reassemble the rear gearing after fitting new tyres? Everything seems to be in correct position but a small bolt with captive nut seems to fit in a triangular hole above the axle, on frame but this then throws the gear all out of position. Any ideas?

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Which side is this on, the right side where the sprockets are, or the left side? Also, do the slots that the axle fit into run horizontally, vertically, or diagonally? – Daniel R Hicks Aug 22 '13 at 11:15
Photos, please. – zenbike Aug 22 '13 at 16:27

Sounds like you're placing the tire back into the wrong gear to begin with. Always remember what gear you left off on as it can ruin your entire setup in a matter of seconds.

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I'm not really sure that the OP has given us enough info to make that diagnosis. – jimirings Aug 22 '13 at 21:20

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