Rear Tire Pressure's - Please check my figures

Then also give the lowest side front , and the rest of the data needed.
Then you get an image from my calculator in next post.
give as much as you have, like GAWR's, GVWR, data read from sidewall of tire as maximum load and AT pressure , speedcode letter ( J to Q).

What Next wrote:
The Michlelins tire chart for your tire says 7230 lbs = 85 lb pressure
http://www.michelinrvtires.com/michelinrv/tires-retreads/load-inflation-tables.jsp

You are correct, sir, the chart does say 85 lbs. Thanks.

Ok, so now my fronts - the heaviest side is 3645 lbs. According to the chart, that's 75 lbs. Does that seem correct or too low?

Always add 10% to what the chart says . Why ride on the border. Add some safety.

When I put these figures in my calculator, I also come to 95psi.
When I look back in this list on the internet.
Michelin RV tires
It reads at your weight without reserve 85 psi.
I checked these lists, and found them to be made with a verry optimistic formula. So only used it to search back the maximum load of Li134/132 wich stands for S4675 and D4410.
Strangely they give it per 2 tires for dual so per side, for wich you did not even have to multiply by 2 as you did.
In Europe they give per axle.
But if you read 95 psi from your list for 7100 lbs on 2 tires, then you probably have a better list.
I also saw in next list on page L11 245/70R19.5 3 times with diferent pressures for G and H load .
Goodyear list look at page 11 245/70R19.5
Mayby this is also the case for your tires. For lower speed a higher maximum load is calculated because lower speed alows more deflection of the tire.

Thinking of chanching my spreadsheet again and add a speedcode of the tire to give better damage and bumping borders.
My goal is to give the highest pressure at wich comfort and gripp is still acceptable, so it leaves as much reserve as possible for things like pressure-loss in time, and misjudging of weight.
Bumping border I use is if real weight on tire is below 85% of the weight the pressure is calculated for. But this is determined by reactions and asuming deflection for up to 99m/h.
If the tire now uses more deflection because of the lesser maximum speed allowed, pressure can be higher because more range in deflection.
On the other hand damage begins sooner because that happens when deflection gets to much , and at lower speed more deflection, so more to the border of damage of 100% for 160km/99m/h.

So to be shure , read from the sidewall the maximum load and needed pressure for that , and I will re-calculate.
Your list probably is for a tire with higher speedcode fi N= up to 140km/85m/h , while the list I linked to from Michelin was for J=100km/62m/h I asume. Then your maximum load is lower and the list gives higher pressure for the same load.So also try to find that letter that stands for the speedcode. could also be that your G-load tire wich is expected to have a maxloadpressure(is lower then maximum pressure) of 110 psi , has a maxloadpress of 95 psi.
This also makes the list different.

My Michelin manual that came with my coach when it was new said to run 85 lbs. in the rear and 90 lbs. in the steer tires. My tires are Michelin XRV's 235/80/22.5 and those pressures did not work for me because, I was experiencing slight tire squirm on the drive axle! So I experimented with tire pressures on different long trips and I found that running 100 lbs. all around works for me the best. I'm in my first year running my second set of XRV's and, I drove 10 years with no tire problems on my first set of XRV's at 100 lbs. Happy Trails, Rooster

cbeierl wrote:

What Next wrote:
The Michlelins tire chart for your tire says 7230 lbs = 85 lb pressure
http://www.michelinrvtires.com/michelinrv/tires-retreads/load-inflation-tables.jsp

Per the linked chart I agree that this is correct. I would add 5 lbs to that (90lbs) to provide a little margin.

X3, the 85 psi + 5 psi.

What Next wrote:
The Michlelins tire chart for your tire says 7230 lbs = 85 lb pressure
http://www.michelinrvtires.com/michelinrv/tires-retreads/load-inflation-tables.jsp

Per the linked chart I agree that this is correct. I would add 5 lbs to that (90lbs) to provide a little margin.

The Michlelins tire chart for your tire says 7230 lbs = 85 lb pressure
http://www.michelinrvtires.com/michelinrv/tires-retreads/load-inflation-tables.jsp

Thank you All!

Sounds correct assuming you used the D "dual", not S "single" part of the table. Agree with previous post about adding 5 extra psi.