We replaces our heavy recliners with Euro chairs that we bought locally. They are made by Lane and when I turned them sideways for traveling, they fit within the dimension of the slide edge and the back wall. This makes the third coach that we have used them in without any problems.
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We ended up buying 2 Lazy Boy recliners that fit in the back and we have enough space left for a table between them. We put sliders on the lazy Boys and they are now easy to move into position. We accidentally discovered that we don't need to strap them in when on the move. We have been on some very rough roads and they don't move.
I would never "assume" that. That is why I say measure before getting ordering anything. The Pinnacle fit in our trailer and many others but mfg. change the dimension of trailers as they see fit.