Check my math

[Red Rocker]

I have Michelin XZA2 Energy 295/80R 22.5 tires, total weight is 31,560, Front is 11,000 Rear is 19,800 full fuel & propane & driver with about half fresh water. I'm showing from the chart 80 psi front & rear, seems low, but would appreciate other opinions. Thanks Mike

[BFlinn181]

What chart? A link would be nice.

[Red Rocker]

Originally Posted by BFlinn181

What chart? A link would be nice.

https://www.michelinrvtires.com/refe...tion-tables/#/

[Ivylog]

Your #s are correct for all manufactures other than Michelin. Some how Michelin can carry the same weight as everyone else put with 5 psi less pressure. I add an extra 5 psi because I still travel in heavy crosswinds which shift a lot of weight to the downwind side and In do not buy cracking Michelins.

[Red Rocker]

Originally Posted by Ivylog

Your #s are correct for all manufactures other than Michelin. Some how Michelin can carry the same weight as everyone else put with 5 psi less pressure. I add an extra 5 psi because I still travel in heavy crosswinds which shift a lot of weight to the downwind side and In do not buy cracking Michelins.

I just bought this rig & it had new Michelins on it, next time around I'm thinking Toyo's seem to be the preferred tire to run. Thanks for your help.

[BFlinn181]

O.K., this chart:

Numbers seem right, but adding 5 psi wouldn't significantly affect ride.

[Red Rocker]

Thanks guys.

[MSHappyCampers]

Looks like you're reading it correctly but that sounds low.


I have the same tires and my coach weighs just a little more than yours. I run 100 PSI all the way around.

[Red Rocker]

Originally Posted by MSHappyCampers

Looks like you're reading it correctly but that sounds low.


I have the same tires and my coach weighs just a little more than yours. I run 100 PSI all the way around.

I'm gonna try 85 front & 90 rear & see how that goes.

[jimmy braden]

a 295 is pretty large also might be a 6+ ply tire. My 03 scepter weighs right about 30K even and I got with 100 on a 275 - 6ply.

[distaff]

Mike,

I would NOT say Toyos are the preferred. They are cheaper. Michelins are considered the gold standard. I've been running Michelin XZA2 Energy 295/80R22.5s on my tag and drive, 305s on my steering axle for 8 years. They provide an excellent ride and I've had no issues.

I may buy Toyos next time because of the price, but I would not run them for 8 years.

BTW I run 120 psi on my fronds, 90 in the rear.

[BFlinn181]

Originally Posted by distaff

Mike,

I would NOT say Toyos are the preferred. They are cheaper. Michelins are considered the gold standard. I've been running Michelin XZA2 Energy 295/80R22.5s on my tag and drive, 305s on my steering axle for 8 years. They provide an excellent ride and I've had no issues.

I may buy Toyos next time because of the price, but I would not run them for 8 years.

BTW I run 120 psi on my fronds, 90 in the rear.

By who?? They are one of the only French automotive products that have a good reputation. (Peugeot, Citroën, Renault, Simca cars I've had the displeasure to be owned by friends that turned out to be automotive jokes)

By 'gold standard' if you mean priced like gold, perhaps.

[TonyMac]

Do you intend to run the tread off these tires, or are you, like many RVers, probably going to replace them due to age long before the tread is gone? Then, rather than running at the least pressure that will carry your weight, why not run at the highest pressure that will give you a good ride and handling? Tires running at lower pressures run hotter that the same tire/weight and higher pressures. I found that with mine, the placard limits ride and handle fine.

[ZackMan]

Originally Posted by BFlinn181

What chart? A link would be nice.

I agree. Is your total weight based on each wheel's weight on a total weight based on a CAT scale, etc.?