Originally Posted by
dirtydozen
I can find cheap chainrings, this operation wouldn't cost me that much.
Except that you're going to need a new chain and you don't know if your RD can handle the spread or not.
That being said, looking up the specs of your RD, a 53/42/34 11-34 combination only exceeds the chainwrap by 2, so you have a good chance of it working. Only one way to find out!