Hitch Extension Options on OEM Hitches
Hi Folks: With all the topics on hitch extensions lately I am now getting concerned that I maybe limiting myself on what type or extent of hitch extension I may be able to install on my new 2015 GMC...
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This is just a guess, but I would expect the "rating" for your hitch with a 36" extension to be about 1/5 of its rating with a standard shank.
Remember torques from high school science class? Force times distance?
Typical standard shanks are around 9" from the cross pin to the center of the ball. You're adding 36" to make a total of 45" from cross pin to the center of the ball.
45/9 = 5
The trailer is 5 times the distance from the receiver. A force of 100lbs at 9" feels like 500lbs to the receiver if it is 45" from the receiver.
THIS IS NOT EXACT. This is just my best guess given my engineering background. The actual de-rating of the receiver might be more, or it might be less. Only the guys who designed it know for sure.
Remember torques from high school science class? Force times distance?
Typical standard shanks are around 9" from the cross pin to the center of the ball. You're adding 36" to make a total of 45" from cross pin to the center of the ball.
45/9 = 5
The trailer is 5 times the distance from the receiver. A force of 100lbs at 9" feels like 500lbs to the receiver if it is 45" from the receiver.
THIS IS NOT EXACT. This is just my best guess given my engineering background. The actual de-rating of the receiver might be more, or it might be less. Only the guys who designed it know for sure.
