Unfortunately that don't work to well at my loc slip. The car also doesn't like getting its feet wet, and there is a drop off at the bottom of the slip. Additionally the swell there means if a boat is floating on the trailer it will get banged around. But if its driven onto rollers or out the water, it instantly out the swell, while I get me out of the boat and car too.
Pneumatic tyres, like blow up jockey wheels? Is that what the bat boats used to have?