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dosbeagles

Cab to axle length

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Another learning question.  Looking at different hauler beds for cab chassis models I see different cab to axle lengths example 60, 84 etc.  What are the disadvantages/advantages of a short cab/axle length vs a longer one.

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And beware that in LDTs, if the frame comes as a cab/chassis has 1 CA dim and if comes as a pickup with a bed, has a different CA dim.  I know for sure GMs are like this.  As for MDTs, dont think it is affected like that and many are more than 84", but 84" is generally a longer CA dim for LDTs.

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On 12/3/2018 at 1:53 AM, Mark and Dale Bruss said:

Shorter axle distance, shorter turns.

If the CA distance is too short, the front of the trailer may contact the back of the cab when making sharp turns.  The hitch is usually located directly over the axle and acts as a pivot point.  If the hitch is located in front or behind the axle, it acts as a lever and pivot; the more the distance, the greater the lever action, which affects backing into a space.  The pin box on the trailer may be adjustable to increase/decrease the distance from the truck, but that may change the stress placed on the pin box.  A hitch on a crew cab pickup truck, even with a long bed, may not provide sufficient clearance between the truck and trailer when turning.

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