If you look at the axle spacing the trandem is slid forward quite a ways compared to a normal quad. They call it an Idaho spread to meet the 5.5’ or 6.5’ off track laws for Idaho’s state roads. Look up idaho off track and it will make since.
Idaho spread?
Discussion in 'Questions From New Drivers' started by Plowboy92, Feb 6, 2021.
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Why are the axles spaced so far apart? I see a lot of quad axle trailers here in OR and most have normal spacing but some have the spacing like the trailer in the link. I assumed it was for running in Canada, as don’t some provinces like a 60” spread vs the traditional 54”? I’m guessing on the exact numbers here. But what would an Idaho tandem location do with the distance between the axles?
And can someone explain why it is hard to bridge out 105.5k in OR? There’s a lot of dump and pup trucks here with looong pull bars btw, so does that mean that OR wants more inside bridge?
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