How to remove a (press fit?) crank arm from a chain ring? Does anyone know how to remove this crank arm? Or if it can be removed? The bike was ~$250 and seems to have a lot of 'don't take this apart' engineering, I'd like to soak the chain rings in rust remover without the arm interfering. The interface is also just a bit loose. It's not clear if there's any way to tighten that gear-looking around the square.
Sorry, those chainrings are riveted in place. You just have to replace the whole crank arm.