Tire Pressure

[K. Meckes]

I have a class A 2019 Thor Axis 27.7. Can anyone tell me the proper tire pressure. The front tires are hancocks and says max load 80 psi cold. Should I keep them at 80? Thank you and stay safe out there.

[Lt Keefer]

Tire pressures are based on the weight they carry. Weigh your motorhome and then set the pressures based on the tire manufacturers weight chart.

[axis earl]

If you do it "right", follow the Lt's recommendation for weighing/following tire pressure chart. In the meantime, you can use the sticker recommendation that is to the left of your steering wheel.

[16ACE27]

Originally Posted by K. Meckes

I have a class A 2019 Thor Axis 27.7. Can anyone tell me the proper tire pressure. The front tires are hancocks and says max load 80 psi cold. Should I keep them at 80? Thank you and stay safe out there.

I think you need to go back and look at your tires again.

They will usually say something like "Max Load 4940 Lbs at 120 PSI cold"

You should have a yellow tire placard/sticker in your coach which gives the recommended tire pressures for your coach; somewhere in the neighborhood of 82 psi front and rear.

[axis earl]

Originally Posted by 16ACE27

I think you need to go back and look at your tires again.

They will usually say something like "Max Load 4940 Lbs at 120 PSI cold"

You should have a yellow tire placard/sticker in your coach which gives the recommended tire pressures for your coach; somewhere in the neighborhood of 82 psi front and rear.

Nope. Ignore what it says on the tires and by the way, they are 16" tires so they would not have such high pressures. 80 should be fine until you get it weighed.

[16ACE27]

Originally Posted by axis earl

Nope. Ignore what it says on the tires and by the way, they are 16" tires so they would not have such high pressures. 80 should be fine until you get it weighed.

That's why I said "something like". I also said look at the tire sticker.

There is a max load (in Kg and lbs) AND a max cold pressure. The OP said "max load 80 psi cold" which was missing the load information.

[axis earl]

My previous RV was a 24.1 Axis. 80 PSI in the front and 70 in the rear was what was recommended for me. It may be somewhat different for your particular model. I had my Axis weighed on each corner before the alignment.

[rynosback]

Look at your drivers door jam. There should be a sticker from the RVs manufacture stating what the tires should be set at. All this is biased on the weight of the RV and the cargo that they have it maxed at.

[K. Meckes]

Thank You. You guys are great. K

[Pete'sMH]

The yellow sticker in the cab has pressures based on the max GVWR. It’s an excellent default pressure and will be fine if you actually travel at your maximum weight. If you are under that weight though you might be happier with lower pressures. As others have suggested you should have your rig weighed loaded for travel (including passengers and however much water and fuel you plan to carry). Ideally weigh each corner separately but at least do front and rear axles individually. Then go online and find the manufacturer’s recommended tire inflation chart for your particular model of tire. Use that number. I usually add a couple of pounds to it just to give me a margin of safety. You’ll be surprised how much difference a few pounds of pressure can make. Many folks just inflate to the maximum allowable pressure printed on the tire sidewall believing they are doing themselves and their tires a favor but they are not. Happy travels!

[abjbrtd]

+1
yep

[TurnerFam]

the 'max' tire rated pressure is just that, the MAX you should EVER run them - which has absolutely NOTHING to do with the weight that is now sitting on them from the extra weight of the RV from the factory - it's likely you'll see a much LOWER psi setting once you weigh your coach, then set them according to the tire manufacturer's WEIGHT ADJUSTMENT settings. You may see 60 to 70s, even.

If you use the 'max' psi for your tires, you're also guaranteeing that you'll have to roughest harshest ride possible - a much smoother ride will be had when you lower the psi to the corrected weight settings. As weight goes up, psi goes down. You may find that your front tires need a different psi than your rears - axles on RVs carry different weights, per tire.

[Long & Winding road]

All if the Axis I looked at (like at Camping World etc) show 75 front and 80 rear for "Cold tire pressure". Its on TWO stickers (from FORD and THOR) on the driver side wall kinda behind my driver seat. I have the E450 chassis.

I have tried a few diff combos but IMO the 80 PSI rear is at MAX load weight.

I have tried 75 in all tires, then I tried 72 in all of them, Then 75 front and 70 rear. But I really cannot tell a difference in ride or MPG or handling. Some member swear by 75 front and 65 rear to make it ride better.

Im thinking 75 front and 72 rear is best for me and how I load the RV. I want max MPG and even tire wear so I think I will stick with this weight.

My sidewalls say something like "Inflate to 80".

[Lt Keefer]

Originally Posted by TurnerFam

If you use the 'max' psi for your tires, you're also guaranteeing that you'll have to roughest harshest ride possible - a much smoother ride will be had when you lower the psi to the corrected weight settings.

I second this. The ride on the first trip after weighing was a lot smoother than the last ride before weighing.

[rudyhehn]

You can get a weight at many truck stops. Load up with your usual gear and fluids first.

[Mag]

I usually set them up 5lb less than the max when cold. Once you're on the interstate doing 70mph they'll heat up to the max pressure by themselves.

[Capt.Tom]

Originally Posted by Mag

I usually set them up 5lb less than the max when cold. Once you're on the interstate doing 70mph they'll heat up to the max pressure by themselves.

Yeah, that's not what they mean. The tire manufacturer knows that the tires are going to heat up and that's why they tell you to fill it cold. Perfectly normal and fine if it heats up to five or more pounds per square inch over the max, that's what the manufacturer intended.

[twovillagers]

Originally Posted by K. Meckes

I have a class A 2019 Thor Axis 27.7. Can anyone tell me the proper tire pressure. The front tires are hancocks and says max load 80 psi cold. Should I keep them at 80? Thank you and stay safe out there.

During my monthly RV exercise trip, I filled my 2019 Vegas 24.1 with fuel and took advantage of the stop to get an accurate weight. With 2 passengers, a full fuel tank, 25% water tank, empty black and gray water and all of the "permanent gear", the weight was 4880/7300 for a total weight of 12,180.
I conservatively added 170/710 to fill water, gray and black water. Also added 20/110 for a full fridge, clothes, etc.
All of that brought my total to 5050/8120 for an adjusted total of 13,170.
Based on this, the chart for my tires from tirepressure.com indicates tire pressure should be 74 front and 62 rear. This is virtually identical to the tire pressure recommended in Col. Felker's Vegas manual and I plan on using the 75/65 he uses. That should be sufficient for a loaded weight of 5120/8492 for a total of 13,612. I do not pull a trailer or car.
I also have Hankook tires and my Vegas has had the sofa removed and two recliners added with some small increase in weight. As many have stated, the best way is to pay the $12 for a good scale weight and look at the tire pressure chart.

[HarleypsychRN]

I was running mine at 90-95 psi but my mechanic told me to go to 80-85. The ride was very harsh when in the 90's. Will report back when I test it out.

[twovillagers]

Originally Posted by HarleypsychRN

I was running mine at 90-95 psi but my mechanic told me to go to 80-85. The ride was very harsh when in the 90's. Will report back when I test it out.

The best way to determine proper tire pressure is to weigh your RV as you normally would use it.
Next, consult the tire inflation chart for your axle weight and tire size to find the correct tire pressure. You have much larger tires than my Thor Vegas, so the pressures I use would not be at all comparable.