Very interesting, these vehicles would be running on dirt roads, have massively thick tyre walls, low speeds. Mountain bike racers usually use the lowest pressure they can without damaging rims or getting flats in order to increase traction and reduce rolling resistance over uneven surfaces (hard tyre = lifting bike over every bump, soft = tyre deforms and bike lifts less) but I suppose these trucks are so slow, tyres so massive that there isnt any relationship between them.
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