What tool do I need to remove this chain ring? I have not been able to find information about it online. At first, I thought it might be unable to change the chain ring, but I see you can buy new ones online (3rd picture). Any help would be appreciated 🙂
by Caboose-The-Moose
8 Comments
That chainring is not removable, it is part of the crank arm. You would need a new crank arm and chainring combination. That chainring pic you included is for a different style of crankset and is not compatible.
Replacement ring has bolt holes because it’s a bolt on ring. The original ring is permanently attached to the crank arm and is not replaceable. You should be able to by a new ring with the arm attached though.
https://preview.redd.it/90mwzj14evpg1.jpeg?width=1080&format=pjpg&auto=webp&s=fbf7f94913107666abd06f28ebf0c651f16a8be6
I see a new square taper crank in your future. They’re very common and inexpensive.
Ring is attached to the crank. Cannot be removed or replaced. You replace the whole crankset.
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You can see the problem by searching for ‘144 bcd crank arm’. A crank that has a removable chainring has a starfish built into it.Â
The first picture is a chainring that is permanently attached to crank. They are machined separately and then pounded together (swaged).Â
The attachment involves starting with a pretty tight fit, and then hammering around the back of the crank to spread the metal for a firmly tight fit.Â
It might be an interesting metalwork experiment if you already have a good hammer and anvil… but the safer approach is to upgrade the crank to one with a bolt on chain ring.Â
A smelter