Having a strange problem removing my chain ring bolt. problem is there is nothing to hold the back piece with because its perfectly rounded/flat, so when i turn the front the whole piece rotates. what do i do ?? All the ones ive seen have a slot so u can use a tool to hold it in place but mine doesnt. Thank you so much in advance.


  • also would a replaced chain ring bolt fit inside? i heard that in some cases the size of the whole is different
    – Edgar
    Commented Aug 22, 2013 at 2:31

1 Answer 1


The crankset you have is actually held together with rivets and not bolts. Some manufacturers of some low-end cranksets make the rivets with a hex head on one side. The easiest way to remove it is with a hex key and a drill. Select a drill bit that is slightly larger than the core of the rivet. Being sure to hold it steady with a hex key, drill enough material out of the back side of the rivet and it should come right out. Replace with a normal chain ring bolt and you're done.

(This is the easy way to remove most rivets. If you're working on a blind rivet - when you can't see the back side - start drilling at an angle. The trick is to mutilate the rivet but not the hole!)

  • HMM sounds confusing. ill do some research and try it out. thanks allot though, you really helped
    – Edgar
    Commented Aug 22, 2013 at 2:18
  • Do you think by using rivets, the manufacturers are actually dropping a hint that the crankset should be replaced as a unit, rather than individual rings?
    – PeteH
    Commented Aug 22, 2013 at 17:03
  • @PeteH No, it's a side effect trying to save cents on manufacturing cost. Rivets are significantly cheaper to buy and to install.
    – Byron Ross
    Commented Aug 28, 2013 at 1:44
  • @ByronRoss this sounded strange to me because obviously to swap in a replacement ring you'd need a riveting tool. The only guy I ever knew who had one of these worked in an auto repair shop, which led me to believe that they're pretty uncommon. But is this not the case?
    – PeteH
    Commented Aug 28, 2013 at 5:59
  • @PeteH I think the idea is that you don't swap the rings (it's a low-end chainset after all) but the OP specifically said that's what he was trying to do. Just because it's not officially supported doesn't mean you can't hack it!
    – Byron Ross
    Commented Aug 28, 2013 at 23:24

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