Tire pressure

[Lurker52]

HI,

I have Goodyear G661 HSA 255/70 R/22.5 load range H tires. I'm trying to find the right pressure. My steer tire have 4210# and 3820# rear on each of the 4 tires. This comes from the cat scale. I can't find my tire chart. I found a couple of others similar and I have come up with 85# for the front and 80# for the rears.

I know some fill to max but I also have learned that is not the right thing to do. If anyone knows where I can find a inflation guide or the correct pressure I would appreciate it.

Thanks as always

[jadatis]

Filled it in, in my made extra safe motorhome calculator. Gave front 100 psi and rear 99 psi, so 100 psi all around .
Then maximum reserve, with still acceptable comfort and gripp.

In my calculator, I use an extra safe formula, wich leads to higher pressure then the officially used european formula, wich on its turn leads to higher pressure then the officially used formula in America.

But first I add 10% to the given loads.
I assume you weighed fully loaded per axle , and devided by 2 front, and 4 rear.

[wolfe10]

atsrmf wrote:
Normally there's a tag somewhere in the motorhome with pressure specs.

Yes, and those "pressure specs" are with each axle loaded to its GAWR.

Your actual axle weight could (and hopefully are) well under those ratings. If so, you could be overinflated at PSI recommended for max weight.

I agree, until you have weighted the coach, a good starting point.

[atsrmf]

Normally there's a tag somewhere in the motorhome with pressure specs.

[ferndaleflyer]

I have 90 in the front and 95 in the rear---I tow a trailer that weighs around 5000lbs

[Airdaile]

Executive wrote:
Given your weights, I'd probably run 85# all around....D

+5 for gauge error.

[wildtoad]

Seems this chart shows the sidewall numbers for the tires, Not what to use by weight.

rk911 wrote:

Lurker52 wrote:
HI,

I have Goodyear G661 HSA 255/70 R/22.5 load range H tires. I'm trying to find the right pressure. My steer tire have 4210# and 3820# rear on each of the 4 tires. This comes from the cat scale. I can't find my tire chart. I found a couple of others similar and I have come up with 85# for the front and 80# for the rears.

I know some fill to max but I also have learned that is not the right thing to do. If anyone knows where I can find a inflation guide or the correct pressure I would appreciate it.

Thanks as always

took about 5-seconds to find via google. here ya go!

https://www.goodyeartrucktires.com/pdf/resources/publications/sellsheets/g661_hsa_sellsheet_oct_2015...

[rk911]

Lurker52 wrote:
HI,

I have Goodyear G661 HSA 255/70 R/22.5 load range H tires. I'm trying to find the right pressure. My steer tire have 4210# and 3820# rear on each of the 4 tires. This comes from the cat scale. I can't find my tire chart. I found a couple of others similar and I have come up with 85# for the front and 80# for the rears.

I know some fill to max but I also have learned that is not the right thing to do. If anyone knows where I can find a inflation guide or the correct pressure I would appreciate it.

Thanks as always

took about 5-seconds to find via google. here ya go!

https://www.goodyeartrucktires.com/pdf/resources/publications/sellsheets/g661_hsa_sellsheet_oct_2015...

[Lurker52]

Yup, That's what I used.

Thanks to all

[Executive45]

Here ya go.....Dennis




Given your weights, I'd probably run 85# all around....D

[ksg5000]

Michelin has a weight/tire pressure guide that I use.

[Lwiddis]

“I also have learned that is not the right thing to do”

If you don’t need the tires maximum weight carrying ability. What does the RV manufacturer and the tire manufacturer say?