I replaced my Shimano WH-RS550 wheels, ten years old, when a wreck damaged the front wheel beyond repair. I replaced them with Fulcrum Quattro LG's, which is a bit of an upgrade. I put an older (but not worn out) 12-25 cassette on the old wheel (I run an 11-28 currently), and keep it as a backup with an older (but still usable) Conti Gatorskin on it. Maybe it'll come in handy someday. It runs fine.