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Open Roads Forum  >  Class A Motorhomes  >  Maintenance Issues & Tips

 > Tire Pressure Chart For Continental Tires

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SGTJOE

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Posted: 09/24/20 08:22pm Link  |  Quote  |  Print  |  Notify Moderator

I can't seem to find a psi chart for Continental tires. Anyone on here that can steer me to one.


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rk911

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Posted: 09/24/20 08:40pm Link  |  Quote  |  Print  |  Notify Moderator

SGTJOE wrote:

I can't seem to find a psi chart for Continental tires. Anyone on here that can steer me to one.


is this it?


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Posted: 09/24/20 09:46pm Link  |  Quote  |  Print  |  Notify Moderator

Here? PSI Chart


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CapriRacer

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Posted: 09/25/20 06:32am Link  |  Quote  |  Print  |  Notify Moderator

SGTJOE wrote:

I can't seem to find a psi chart for Continental tires. Anyone on here that can steer me to one.


Sorry, but Tire Load Tables are NOT specific to a brand of tires. They are published by tire standardizing organizations such The Tire and Rim Association (US based) and are the same regardless of the manufacturer. You can sometimes find portions of those tables published by tire manufacturers, but those are only reproductions of what the standardizing body published.

So to answer your question: ANY table will work. Just make sure the table you use is appropriate to the application. There will be difference based on what kind of vehicle and the intended service.


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IAMICHABOD

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Posted: 09/25/20 08:52am Link  |  Quote  |  Print  |  Notify Moderator

CapriRacer wrote:



Sorry, but Tire Load Tables are NOT specific to a brand of tires. They are published by tire standardizing organizations such The Tire and Rim Association (US based) and are the same regardless of the manufacturer. You can sometimes find portions of those tables published by tire manufacturers, but those are only reproductions of what the standardizing body published.

So to answer your question: ANY table will work. Just make sure the table you use is appropriate to the application. There will be difference based on what kind of vehicle and the intended service.


Like this one,it has many sizes,just scroll thru and find what you need.

Tire Inflation Chart


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jadatis

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Posted: 09/25/20 10:39am Link  |  Quote  |  Print  |  Notify Moderator

My made pressure/loadcapacity lists

Made my own pressure/ loadcapacity list, and placed them on my onedrive.
You can choose per tire /axle single/axle dual given, so you dont need to devide by the number of tires on the axle.

Made with my determined extra save formula, wich gives higher pressures then the official lists.

Beforelooking up the weight , first add 10% for reserve to the accurate determined load in use.
Determining the weights is the most tricky part in it all.

Need to search on sidewall for 3 things.
1.maximum load or loadindex ( fi 123/120 then 123 for Single load so 2 tires and rimms on the axle and 120 Dual load so 4 tires on rimm on the axle)
2, Loadrange or plyrating to determine the pressure behind AT, is called reference-pressure
3. Less important speedcode, to determine the speed for wich the maximum load is calculated.

Or give it all here, and I will calculate for you, and will give a full report.

William B

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Posted: 09/26/20 06:46am Link  |  Quote  |  Print  |  Notify Moderator

CapriRacer wrote:

SGTJOE wrote:

I can't seem to find a psi chart for Continental tires. Anyone on here that can steer me to one.


Sorry, but Tire Load Tables are NOT specific to a brand of tires. They are published by tire standardizing organizations such The Tire and Rim Association (US based) and are the same regardless of the manufacturer. You can sometimes find portions of those tables published by tire manufacturers, but those are only reproductions of what the standardizing body published.

So to answer your question: ANY table will work. Just make sure the table you use is appropriate to the application. There will be difference based on what kind of vehicle and the intended service.


Then why do two different Michelin tires of the same size 295/80R22.5, the ZXA2 and the H Coach have different load tables, and why do my Toyo's of the same size have yet again different tables? Maybe that works for car tires, but it doesn't work for large truck/RV tires


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jadatis

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Posted: 09/26/20 04:21pm Link  |  Quote  |  Print  |  Notify Moderator

Its because the one is calculated in maximum load for another speed ten the other. Rv tires mostly for 81 ( 130) or 87 mph ( 140 kmph), and the X Coach for only 75 mph (120kmph)
Car tires are always calculated in maximum load for 99mph( 160 kmph).

MICHELIN XZA2 7830 lbs AT 120 psi is Loadindex 152 AT 8.3 bar
X-coach 8270 lbs AT 123 psi is loadindex 154 AT 8.5 bar
X multiway 7830lbs AT 123 psi, is LI 152 AT 8.5 bar.
So even 3 tires I saw on the Michelin site in the sise 295/80R22.5

Can also be that the first and third are for 75mph(120 kmph) and the second for 68 mph( 110kphmph). For those tires they dont give maximum speed of tire on the site.

3th list highest gives for 120 psi lower ,because the chose maxload AT 123 psi. And first gives full 7830 at 120 psi.

In case of daubt always use the list that leads to higher pressure. Better to high , to low can give ireversible tire-damage, to high only discomfort and lesser gripp.

* This post was last edited 09/27/20 04:32am by jadatis *   View edit history

William B

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Posted: 09/27/20 06:25am Link  |  Quote  |  Print  |  Notify Moderator

Okay perhaps it is the speed difference, but nonetheless SGTJoe's post that all of the same size tires have the same load table is wrong. Find the table for your size and model and use that.

CapriRacer

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Posted: 09/27/20 07:06am Link  |  Quote  |  Print  |  Notify Moderator

William B wrote:

CapriRacer wrote:

SGTJOE wrote:

I can't seem to find a psi chart for Continental tires. Anyone on here that can steer me to one.


Sorry, but Tire Load Tables are NOT specific to a brand of tires. They are published by tire standardizing organizations such The Tire and Rim Association (US based) and are the same regardless of the manufacturer. You can sometimes find portions of those tables published by tire manufacturers, but those are only reproductions of what the standardizing body published.

So to answer your question: ANY table will work. Just make sure the table you use is appropriate to the application. There will be difference based on what kind of vehicle and the intended service.


Then why do two different Michelin tires of the same size 295/80R22.5, the ZXA2 and the H Coach have different load tables, and why do my Toyo's of the same size have yet again different tables? Maybe that works for car tires, but it doesn't work for large truck/RV tires


Because Michelin - in their infinite wisdom - didn't tell you that they modified the tables according to the service (in particular speed). Figures that Michelin would complicate something that is supposed to be simple! (Jadatis has a post above this one that explains in more detail.)

As far as Toyo is concerned - I couldn't find a load table on the internet for any of their 295/80R22.5's. Do you have a link?

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