Pajerooff Garasje

[pajerooff]

Måtte bare ta vare på dette, interresant førr en tidligere dekkmann!!



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mmyers


Registered: Aug 1999
Location: The "Couve"
There was a really good article in the 4wp rag about this very topic.

I would scan it for all to see, but I don't have a scanner.

It went a little something like this.

Start by weighing the rig, either loaded or empty, or both.

Figure out what the front axle weighs (pull onto a truck scale with the front only) and make note. Do the same with the rear.

Divide the front (or rear) weight in half. This gives you the weight per tire (Again, weight per each front tire, or rear tire).

Now it gets sexy.

Make a graph on a sheet of paper. Make the bottom(x axis) tire pressure. At the far left side, mark 0. At the right side mark the max weighted load of the tire(Usually 35 psi). Graph paper makes this a no brainer.

On the y axis, At the bottom, mark 0. and the top of the bar list the max rated tire weight(Read from the side wall of the tire).

make a really small tick mark that would join the max weight with the max pressure. you are basically making a square on the graph.

Draw a diagonal line from the zero marks to the tick mark.

plot the weight for the axle(Divided by two. Remember we are figuring out one tire) and draw a horizontal line to the diagonal line. Now, draw the line straight down, and this will indicate the proper inflation pressure.

Make sense??

When you complete this, option 2 is to use this pressure as a starting point, and line up the rig so it will go balls straight. Use some kids sidewalk chalk and paint the tire with it. Make a decent footprint, usually the tread width and about 10" of the circumference.

Drive the rig STRAIGHT, so the tire make a few revolutions. If all is well, the chalk should be evenly worn, and the footprint is correct.

Make sense??

I did this to mine(33x12.5-15) and came up with 24psi front and 18 psi rear. Great wear, not detrimental effects.

I know it sounds low, but this is because we have been trained with the 32psi thing our whole lives.

Do the math, chalk your wheels, and have a happy trip to the Carolinas.

HTH

M.

If someone has this article from 4WP, and can scan this, please do. This is a great reference for inflating oversize tires.



Mvh
Pajerooff



Endret av - pajerooff on 31 jan 2004 23:33:15