When it's a fourteen-wheeler. Or a ten-wheeler.
Technology marches on, you see. You know those wide, low-profile tires that have started showing up on customized cars? Something similar is available for big trucks now. One tire as wide as the dual-wheel assembly on a "normal" tractor or trailer. Apparently they decrease rolling resistance and improve gas mileage.
Our newest trailers have them. So do our very newest trucks. Looks like the day of dual wheels is almost past.
And when will they change all those road signs? "Trucks six wheels and over..." That could be pretty darn big.
Oh, well. The language has never really kept up. I mean, really. How many Teamsters can handle a coach and four these days?
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