Setting tire pressure drive axle and tag

Question

Just weighed our MH. First tag for us. The rigs overall weight and axle weights are with their ratings. Easy to set the fronts. But I'm curious what the rest do for the weights on the drive axle vs tag. I'm tempted to leave the drive axle dual tires and tag the same. Even though the weight on the tag is much less.

So basing the psi setting on the load on the drive axle. 105 lbs on drive and tag. The tags is only at 8500 lbs. technically it could be set at 85 psi based on the charts.

What say you?

twomed · Answer

I run mine all the same...coincidently 105psi too. Over 100k miles no issues.

ivylog · Answer

I run 105, 100, 80 which if +5 more than the chart as I’ll still drive in a heavy cross winds... shifting a lot of weight . Your Discovery must gross over 50,000.

bill_satellite · Answer

You can't know the proper pressure setting unless you weigh all 6 positions individually. If the front axle weighs 15,000# that does not mean that each tire is carrying 7,500#. The left front could be 7,000# and the right front 8,000# (let's hope not, though). You have to set tire pressure based upon the highest weigh carried by any tire on that axle.
The tag axle will carry the least amount of weight and it's likely that 85-90# is correct. I can't compare your coach to mine (or any 2 coaches) but I have 110# on the front, 100# on the drive and 90# on the tag.

executive45 · Answer

Mine is the same as Bill's. 110 100 90....Dennis

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Setting tire pressure drive axle and tag

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