Onlookers are absolutely stunned the first time they see a Rhodes pick up speed as it backs down the ramp, then self-launch as the transom hits the water and the driver hits the brakes. The entire launch is so fast, kibitzers who blink, miss the show. Still remaining were some lesser design needs. Anyone who recognized them, could solve them. So a dropped axle was used.
Bigger wheels make fewer revolutions to cover the same territory.
Their bearings last much longer than the small wheels found on other trailers. Witness all those disabled rigs you see along the highways. Bearings warm up in use. Sudden submersion cools them, creating a vacuum that sucks in the sea. So we added pressure caps.