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			In the manufacturing arena, axle spacing would be the distance between the center line of the drive axles in the case of a truck and the "spread" of the axles on a multiple axle trailer. If you've heard of a trailer suspension referred to as a three nine, that just means 3 axles 9 feet apart. This used to be popular with steel haulers.  
		
		
		
		
		
		
		
		
	
	As far as what the DOT does...... well that's a whole new ball game    
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			There is a kind of explanation on the model magazine forum, scroll down 1/3 
		
		
		
		
		
		
		
		
	
	and look at the picture. http://www.modelcarsmag.com/forums/t...bius-lonestar/ It's funny to see that nobody or everybody knows what is the right or wrong method is   And DOT in each country does not make it easier either exception is lurking around.
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 I am not trying to spec a truck. Just wondering how and what rules there is out there. I am curious like bigford is  | 
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