When we replaced carpet for vinyl, the slideout did not give is a problem. It cleared the floor by 5/8" or so, However, being belt and suspenders kinds we stuck one of the self adhesive teflon furniture glides, went with 2 1/2" diameter, under each corner of the slide. Been mar free for well over a year now. Don't believe they actually touch the floor during extention/retraction.
Our EasyRest couch was a different story. The OEM hard plastic rollers did mar the vinyl. Replaced them with non-marring polyethelene casters. Sweet! Got ours at Harbor Freight, but any decent hardware store etc., has them. 2" size <$5 ea.
Fair Winds and Following Seas!
Terry & Rosalina
2007 Winnebago Journey 34SE
Retired Navy Mustang & Navy Wife