Last updated Oct 74 2021
Almost all tire companies follow similar load formula calculations in the USA, Europe and Asia. BUT minor differences occasionally occur due to doing calculations in inches and pounds vs millimeters and kilograms as there is rounding that takes place along with some minor differences in some "K" factors. Also some sizes have been around for decades so their load capacities may not match the formulas exactly but are just accepted as acceptably close. So there are minor variations. This is why it is best to use the tables published by the company that makes your brand of tire.
Sometimes this is easy because you use one of the big name companies such as Goodyear or Michelin while other times you may find you have tires that are not actually made by the company with the name on the sidewall but are in fact just imports made in common molds with changeable nameplates.
This post will be updated when I learn about a company posting load inflation tables for their line of tires. If you find an error or omission, please drop me an email (address under my picture on the right) with the link that needs correcting or new link and I will update this post. That way you can bookmark this page and save it for future use.
I plan on listing the links base of alphabetical list of the tire company name.
To the best of my knowledge Both Goodyear and Bridgestone/Firestone follow the Tire & Rim Association (US) published tables so you can simply look at their tables for the numbers if you can't find your tires in any of the links below.
If you find a broken or bad link please send me an email so I can fix it. Thanks.
Links to Load Inflation charts, How to Weigh your RV worksheet and related material. Note Bridgestone "Medium and Light Truck data Book includes Load inflation tables for 16" and larger tires for both Bridgestone and Firestone brand tires.
Carslile Has product info and size list but no Load Inflation tables However since they only have ST type tires which I suggest always be run at the inflation pressure molded on the tire you can use the max load info to confirm you are running under the tire max by at least 15% for longer tire life while still maintaining the tire max inflation. They do have three larger size ST type tires found HERE
Databook for commercial tires
Cooper Does not publish Load & Inflation tables. I suggest you use Bridgestone or Goodyear tables
Double Coin truck tire
Load & inflation for 19.5" and larger
General truck tires
Load Inflation tables
RV tire information including link to Load & Inflation tables
Hankook Medium-duty Truck tire info. The link will download their catalog with Load & Inflation info.
Hercules Does not publish Load & Inflation tables. I suggest you use Bridgestone or Goodyear tables. BUT their high load ST tire info can be found HERE
Product info page and links to their technical information.
Note they show both P-metric and "Euro-metric tires that do not have a P prefix but based on the inflation these are basically passenger type tires even though some are listed under "Light Truck". Only their "Road Venture has actual LT type tires listed. They do have 19.5 and 22.5 size tires.
MAXXIS LT tires
Tire data on LT tires but no Load Inflation tables. I suggest you use Bridgestone or Goodyear tables
MAXXIS Trailer tires
Tire data on ST tires but no Load Inflation tables. I suggest you use Goodyear tables
MAXXIS Trailer Load & Inflation tables
RV Tire guide and links to Reference Materials and Load Inflation tables for 16" to 24.5" tires in RV application. NOTE many of the Michelin tables are not based on single tire loads but axle loads so you will need to divide the Michelin numbers by 2 for Fronts and by 4 for dual position individual tire loading. This just adds a bit of confusion to your calculations. I also am aware that a number of Michelin tires do not follow the US TRA tables so if you are using Michelin brand you really do need to use their tables. 16" and other size Load Inflation tables can be found HERE
This importer is offering 75 mph speed rating on these ST type tires.
Sailun S637 17.5 size Tire information Load & Inflation tables. Here is info for their ST637T ST type tire
Sumitomo you can download their booklet on Medium Truck size tires for 19.5 & 22.5 sizes
Load Inflation table on pg 4
Towmax does not publish tables only the tire max load.
RV tire care and Load & Inflation tables. Also a good overview of info on tires including Passenger tires. Truck size (22.5) info can be found HERE
Trailer King has tire spec sheet shat show the max load and required inflation HERE.
Uniroyal LT size info. They say to use the Michelin Load & Inflation tables. "It's important that you get all the safety-related materials that come with the purchase of new Uniroyal passenger and light truck tires. If you did not receive a warranty book, you can download one at www.uniroyaltires.com/care. If you did not register your tires, please take a moment to do so at www.uniroyaltires.com. Registering your tires is easy and takes just a minute."
Info on their commercial tires on pg 23 HERE.
Others will be added when the tire company responds to my request for a link, or when someone lets me know about a link.
NOTE If you can't find your specific tire size load & infl info from your mfg you should call their Customer Service number. I also note that the Toyo technical guide has LOTS of useful information.
How to read a tire Load Inflation table
Barry's Tire Tech
National Highway Traffic Safety Administration
File a complaint about a tire failure with NHTSA
Air Pressure, Temperature variation
or go HERE
Passenger tire inflation w/video
The Tire & Rim Association. Where to buy Industry Standards books
MasterCraft tire Education
Rubber Manufacturers Association
Links to Tire Safety information
RV Safety Education Foundation
RV education and tire weighing service
General information and weight calculations for trailer owners
Please send me an email Tireman9 at gmail.com if you find one of these links is broken. Thanks
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##RVT803 (updated 7/2017)