TATRA trucks in the below pictures that I know from my childhood and that used to make me crazy have got more or less wheels that are strongly slanting towards the inside of the lorries... This solution which is not easy to understand for first has got 2 advantages:
a) Slanting wheels are following the curvature of the Earth not only in the driving direction of the lorries but also in a side direction... This means that such wheels lift the car once again from the ground so that it hovers higher and you need less energy to move it than in general...
b) Of course, slanting wheels are also like a railway on roads with a saddling that doesn't only mean safety but also that the wheels on just one side of the lorry are used when the the vehicle is moving...
"Chopper bicycles" must be the most comfortable bikes in the world - only I don't know if they still belong to heavy industry...
Best wishes, Joseph de la Mikula and Team
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