That question is sort of like asking, "Which is better, propellers or jet engines?"
Jets have essentially replaced propeller driven aircraft, but both are still being built and both function very well in specific situations, one better suited than the other depending on how it's to be used.
Cable driven slides, just like hydraulic or gear driven systems all function well in specific situations and each has benefits and disadvantages. Cable systems, in my opinion, seem to be well suited for small slides, take up less space, weigh less and are reliable, but they don't seem well suited for larger, heavy slides as the pulley systems and guides tend to wear unless the owner stays on top of maintenance and adjustment.
Gear driven slides are reliable, fairly easy to work on, function well on larger slides, but are heavier, bulky and not really well suited to employ on smaller slides like bedroom or wardrobe slides.
Hydraulic slides are usually only seen in larger RV's and not commonly used on travel trailers, rather they are most often used on large toy haulers and heavier fifth wheelers where multiple slides can be driven by a central hydraulic pump.
All types of slides are becoming more and more reliable, but in travel trailers, the cable driven and gear driven are most common. Both seem to do very well in these applications.
Knowing how to maintain and operate the mechanism in the event of a system failure is the key to owning either type of slide system.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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