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.
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also would a replaced chain ring bolt fit inside? i heard that in some cases the size of the whole is different– EdgarCommented Aug 22, 2013 at 2:31
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1 Answer
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!)
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HMM sounds confusing. ill do some research and try it out. thanks allot though, you really helped– EdgarCommented Aug 22, 2013 at 2:18
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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?– PeteHCommented Aug 22, 2013 at 17:03
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@PeteH No, it's a side effect trying to save cents on manufacturing cost. Rivets are significantly cheaper to buy and to install. Commented Aug 28, 2013 at 1:44
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@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?– PeteHCommented Aug 28, 2013 at 5:59
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@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! Commented Aug 28, 2013 at 23:24