Hi.

I got a hybrid male bike with 28" wheels.
It come with a standard backboard that can hold up to 25kg, rear rack is maby the right word, that hold 25kg for cargo or a small kid.

Recently someone adult sit back to it, the bike was not running but i want to ask what kind of thing can be broken if its to mutch pressure on it?

Wonder of the mounting part on the aluminum chassi/tube can be broken because of that?

Thanks for reply.