I was thinking about the rollers, attached picture illustrates one possible alternative.
Rollers could be made of metal /
Bojan,
I have alloy "vee"rollers on my boat trailer. After battling with urethane ones for some time, I swear by them.
They work very well, but are hard to come by, and were app $8.00 each. I think the urethane ones will eventually get a flat spot from static loading as do so many roll off's using urethane castors.
Rod
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