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The homemade cat trax. Northern Tool dock wheels cost $50 each including shipping. Axle is 1.5" galvanized conduit ($32 at HD, just under 2" OD to fit in wheels). 2" PVC pipe ($8 at HD) slips over conduit to space wheels 60" apart. I

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I forget the sizes, but the PVC pipe and fitting insert into the galvanized conduit so the tie off rope doesn't get cut by the pipe. The foot or so of PVC pipe keeps it from falling out of the galvanized conduit.

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Used the same 2" PVC for the part the hulls rest on. GLues outdoor carpet to it, but that gets crushed easily - rubber or cradle would be better.

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Glued 2" to 4" adapter to 2" pipe, and glued a reducer inside the 4" adapter to give it strength. Not sure this is required. Used hose clamp on rubber to keep outer roller from sliding off the end of the pipe. The black part the ora

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The dock wheels have 3/4" holes in them to flood them. I plugged the holes with plastic hole plugs from Ace (50 cents each). One hole was smaller and had to be drilled out to 3/4. I siliconed them in. Plugging the holes reduces the weight of ever

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The whole thing is spaced in position between the hose clamps. The PVC acts as washers. No additional holes in the pipe to rust out. I use this on packed gravel parking lot and concrete boat ramps for my P16 and it works great and sounds like popping c