I have a large Seadoo single tube that I can put an adult and a kid in and tow that with zero problems. I've never tried a side by side tube but I would suspect it would do it no problems. At 230# and 6'2" my Speedster can yank me out of the water on two skis like nothing, and it's harder to pull a skier out than a tube I think. I can also get out of the water on a slalom ski, but I, not the boat need to work harder. Knee boarding behind the Speedster is also easy for the boat. If you haven't towed yet you'll have to find the correct rpm to do it at. I want to say I tow at about 4500 RPM anything lower and your constantly in and out of the power and it can be frustrating, hence the Speedster SK has the 720's which have a much different power range. You'll know what I'm talking about when you start doing it, you'll feel it. I also use the retractable pylon to tow everything from.