✦ New forum topic posted to REO Royale Owners Groupalsancle 3w FollowCorrect Cooling Hose Clamps for the RoyaleFrom my lunch with @JohnGPhillips yesterday at Hershey. These are the correct hose clamps for the Royale. 2 1/4" diameter when open. 1 / 4 Oct 9, 2026LikeLiked15Reply5 Share