>>1773438cheap riveted cranks (like on that GT) when you drill them look like this. The middle ring is connected to the crank. The big and small are just riveted to the middle ring. You snap the plastic crap all off, then drill through the head of the rivets, any large enough normal bit and a hand drill will do this, the metal they use is soft, then you can just hit them out with a punch and the chainrings will come off. You need to remove the crank arm to get the inner ring out in most cases.
easy to turn a 3x7 shitter into 1x7 (or 1x1 in this case)
I do this fairly regularly
but yeah, it will drop chains if you beat on it. I think it's mostly ok with a strong enough spring in the rear, but one of the reason cheap shitters have 3x is the fd acts as a idiotproof chain keeper.
also, on worn cranks, normally the middle ring is the worn one, so sometimes it's stupid to delete the good ones.
