Here is my AI cart. After destroying several PVC carts and struggling with the deep Florida sand, I was constantly looking for a better cart design.
Years ago I was given a cart used for Sunfish sailboats. The cart was very big with knobby tires a little bigger than the black ones sold for kayak carts. At that time I shortened the axel and the web sling so it fit my AI. Nonetheless, even with the bigger black knobby tires, it dug into the sand. I left this big bulky thing at home most of the time. Here is picture of the original cart http://www.westcoastsailing.net/osComme ... i-531.html
I happened to be fishing near a lifeguard stand and a female lifeguard easily wheeled out a waverunner on a cart made with very big wheeleeze.
I decided to revisit my cart.
I immediately ordered the biggest tires wheeleeze makes (49CM w/ 1 inch axel diameter. I also bought the long alum axel from Wheeleexe and cut it in two pieces because the original axel on the cart was not long enough to get the fat wheels out beyond the cart.
Here is a pic and discussion from our local club. https://www.gulfcoastkayakfishing.com/f ... e=1#M13309
Besides the tires that float over the sand like a magic carpet, the physics that make this cart work so well is that the long cart handle (not shown int he pic) extends beyond the nose of the yak. This allows me to pull on the cart and not the yak. Most yak carts have to be strapped or otherwise held from slipping because the sand puts enourmous pressure on the cart and the yak wants to slide. By pulling the cart and not the yak, the yak has no tendency to slide or move.
Hobie might talk to the sunfish cart company (???) and work a deal with both them and wheeleeze. It will be expensive but at 47 years old, I have no trouble hauling my approx 200 lbs of gear across 200 yards of deep sand. Before I would damn near have a heart attack.