I have a class V hitch with 2.5 inch receiver. Decided to use the 2 inch sleeve and use a 2 inch shank. Glad I did because I broke down in the middle of nowhere. Had to have a tow truck come out to tow truck and TT. Tow truck put my truck on the flat bed, and had to use my hitch to hook the TT up to the tow truck. If I had a 2.5 inch shank, the tow truck would not have been able to tow the TT as he had a 2 inch receiver only.
I welded the sleeve in the hitch so it's not going anywhere.
Mike