Is there any hardware to slide a tube gate?

[GuglioLS]

Perhaps consider a cantilever gate setup where the gate is completely suspended. The gate will need to be at least twice as long as the opening (for balance) using 4 gate wheels, 2 to suspended gate above ground and 2 wheels as guides on the top of gate. Click Here for the source of cantilever wheels

 

[FastEddieR]

How about using a corral panel instead of a gate? they have the rounded standoffs on the ends at the bottom, very easy to slide. that's what I use as gates for our horse stalls, except I put gate hinges on one end. You could just use your existing method of holding your gate in place. Or you could look into a panel/walk in gate like this: Premier Walk Thru Panels and just use the chain to hold it in place on the wall. Taht way for everyday walk in you just use the small gate, moving in bigger stuff you slide the whole panel to the side.