I wouldn't mind driving a small truck like those (and getting 40 - 50 mpg), but I only want to drive one if EVERYONE else is driving the same size.
The American trucks would crunch those litte Japanese trucks like steping on an empty beer can.
They do import those small trucks here in to the USA after a certain amount of years, but most are not Freeway legal to drive. To get them street legal here in the States I think you have to put better tires on them. Payload capacity is OK, but not great. Suspension will probably need upgrades too. I don't think the trucks were designed to carry a normal camper around on.
They make great farm vehicles and back road vehicles. Some have 4x4, heaters, and air conditioning.
http://intermountainminitrucks.com/index.html
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Re: Stans post. Wow! We are obsessed with big trucks with big suspensions here. I wonder if those mini trucks have leaves, bags, and E rated tires??
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