Ours isn't a 3-4 man tube, it's only a 2 man tube, made by SpeedZone. It's called a Speed Zone 2. My boyz really like it. I'd suggest a bungee type rope for it though.
I got an HO 4 man from Costco for 180 and it came with a rope. Way way cheaper than anywhere else I found. Had the same one in the 3 man and there is little difference. The 4 man ads a kneeling seat in the very back center which doubles as a spot to climb up, including handles. You can't see it in this pic, but it's there. This was the first time out with it last weekend so we haven't had it fully loaded yet. The 3 seater that had the same set up worked great with 3 up.
Purchased the same 4 person tube from Costco a few weeks ago, it is awesome and a way better buy than anything else I found. Kids love it and it is very stable and safe. What else would you expect from Costco.
I have a Coleman 4 person. Its about 9.5' front rear and 7.5' side to side. It will hold 6 easy. Takes for ever to air up tho and is to big to air up at home. But its fun..
my mable is made by sportsstuff...one of the best tube manufacturers out there, very strong and durable. we load the thing up with 3 adults and put it to the test all the time too.
There are several good 3-4 person tubes available. Quality brands are Sportsstuff, Airhead, and Aquaglide. One popular from Aquaglide is the Retro 3 person - can ride two different ways. See if this helps.
Big mable rocks. So glad I bought it. I have the quad, but I would get the triple if I did it again. The quad wants to take to the air with 3 or less kids on it.