Question for the engineer types. If. The rear bumper lowers 2 inches or so when the fifth wheel landing gears are retracted, then air bags are installed and inflated sufficient to raise the rear bumper back to its original position. Has the load distribution between the front and rear axles changed?

flyfishing48 wrote:Question for the engineer types. If. The rear bumper lowers 2 inches or so when the fifth wheel landing gears are retracted, then air bags are installed and inflated sufficient to raise the rear bumper back to its original position. Has the load distribution between the front and rear axles changed?It might a little,but why would you want to do that? I don't.

No. The weight distribution between the front and rear axles will be essentially the same with air in the air bags or without.

It would seem to me that if the rear of the truck goes down.....then front has to come up. And it in fact does. So if the front is moving up it must be now lighter.?Though in my example of 2" , there would be very few pounds difference I would think.

Why don't you measure and find out? You MIGHT shift a couple pounds of front because of the normal rake of the truck, but I doubt its anything substantial.

flyfishing48 wrote:It would seem to me that if the rear of the truck goes down.....then front has to come up. And it in fact does. So if the front is moving up it must be now lighter.?Though in my example of 2" , there would be very few pounds difference I would think.Not necessisarily, the front axle is just another pivot point. If your thought was correct, then adding even more would cause the front end to lift off the ground. Not likely although it could happen if the 5th wheel hitch location was behind the rear axle.

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flyfishing48
Explorer
Nov 07, 2014
It would seem to me that if the rear of the truck goes down.....then front has to come up. And it in fact does.
So if the front is moving up it must be now lighter.?
Though in my example of 2" , there would be very few pounds difference I would think.
oughtsix
Explorer
Nov 07, 2014
No. The weight distribution between the front and rear axles will be essentially the same with air in the air bags or without.
john_bet
Explorer II
Nov 07, 2014
flyfishing48 wrote:
Question for the engineer types. If.
The rear bumper lowers 2 inches or so when the fifth wheel landing gears are retracted, then air bags are installed and inflated sufficient to raise the rear bumper back to its original position.
Has the load distribution between the front and rear axles changed?
It might a little,but why would you want to do that? I don't.

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