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  1. #1
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    Chainring bolts stripped

    Trying to turn my old specialized hard rock into a single speed. The chainring bolts are stripped, so I used a screw extractor which got the bolt turning, but the nut turns too. There is no slot on the nut for a chainring bolt tool. Any suggestions?

  2. #2
    Bianchi Goddess Bianchigirll's Avatar
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    there is no slot for the spanner? you are talking about the middle and big ring right? that is odd. there should be slots to us a tool something like this http://www.ochsnerusa-store.com/prod...rod=CA-7130005

    I would spray the bolts from the back with a penatrating oil then try the allen wrench (if you still can) using a big screwdriver between the rings to apply pressure to keep the nut from turning
    Bianchis '87 Sport SX, '90 Proto (2), '91 Boarala 'cross, '93 Project 3, '88 Trofeo, '86 Volpe, '89 Axis, '79 Mixte SOLD, '99 Mega Pro XL Ti, '97 Ti Megatube, , '90 something Vento 603,

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  3. #3
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    drill them out.

  4. #4
    Bianchi Goddess Bianchigirll's Avatar
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    if they are already spinning it is hard to drill them
    Bianchis '87 Sport SX, '90 Proto (2), '91 Boarala 'cross, '93 Project 3, '88 Trofeo, '86 Volpe, '89 Axis, '79 Mixte SOLD, '99 Mega Pro XL Ti, '97 Ti Megatube, , '90 something Vento 603,

    Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '86 Bertoni (sold), '09 Motobecane SS, '98 Hetchins M.O., '09 K2 Mainframe, '89 Trek 2000, '?? Jane Doe (still on the drawing board), '90ish Haro Escape

  5. #5
    Senior Member sunburst's Avatar
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    I had to drill some out of an old Peugeot. I think you could probably wedge a screwdriver in there somehow to stop the spinning, that is, if they spin when you drill.

  6. #6
    AEO
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    use another screw extractor on the backside nuts.


    try holding the nuts with a pair of locking pliers.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
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    I have a feeling that the chain ring "bolts" are actually rivets. I've seen them where they look like a regular hex recessed crank bolt but they are riveted on the other side.

    Can you post a pic of the front and back of the crankset?

  8. #8
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    Thanks for all the replies. Yes, the "bolts" were actually rivets. I found this out after drilling one of them out. I successfully drilled all of them out.

    I'm assuming I can put regular (albeit shorter) bolts to replace these?

    Now on to the next project--a cassette that won't budge. Geez...seemed like an easy enough project at first.

  9. #9
    Senior Member Iowegian's Avatar
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    Standard bolts should fit and if they don't get the drill back out

    I assume you mean the freewheel won't budge. If it is a freewheel, make sure you have the right extractor and use a skewer to hold it tight. Either hold the extractor with a vise and try to turn the wheel or get a big wrench and a cheater bar for more leverage. Using some penetrating oil (Kroil, etc. not WD-40) might help too.

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