[quote=DamonLinkous]Do you mean these?
[url]http://www.homedepot.com/h_d1/N-5yc1v/R-202327305/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053[/url]
They are only 14.5 inches tall and 3 inches wide, so you would need to be moving over a hard smooth surface. The small diameter would mean you wouldn't have much ground clearance.
Lots of people have attempted home-made beach wheels and some "recipes" work for a specific purpose. I've never seen a set that could handle real soft sand like on the Gulf Coast, but lots of people launch from concrete or hard dirt where lesser wheels can do the job.
These wheels are the same price but 15 inches tall and 6 inches wide.
[url]http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?locStoreNum=703&productId=202188267&catalogId=10053&storeId=10051[/url]
Maybe a design with four of these (inside and outside of each hull) with a 3/4 inch stainless or galvanized steel axle would work. How much does a 10 foot 3/4 inch steel rod weigh?
Just to compare, the "real" CatTrax have tires that are 21 x 10.[/quote]
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