C-Tug Kayak cart mod for sand

Hi
Anyone try to modify their C-Tug Kayak wheels for sand?  (I don't have the Sand trakz wheels and I don't want to spend another $100+ for a new cart) I don't quite understand the physics of how a wheel can move through a sand with the least resistance.  I believe minimizing PSI, pounds per square inch, is key and I've read the wheel should "conform" to the shape of the surface thereby reducing the berm that is created from a wheel that has dug down in to the sand.  I thought of adhering a half sphere of pool noodle to the outer circumference of the wheel.  I also thought of retro fitting a pneumatic ballon tire but this would require a new axle. Any advice would be appreciated.
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"Search" is your friend.

I've got the sand wheels on my c-tug and they create more drag on pavement don't know if they really do a whole lot for sand lol

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Deja Vu. This post is so weird

http://www.norcalkayakanglers.com/index.php?topic=88366.msg1006834#msg1006834