I would like to remove the crank arm off a 4-arm LX chainset so I can replace all 3 chainrings (they are all attached together from a 4-arm XT chainset)
Need to take off the spring clip above the locking nut on the back then undo locking nut not sure of the tool part number but knowing shimano it won't be cheap you could try knocking it round using a drift but this won't be pretty and you'll need a new locking nut probably