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Tuesday, April 21, 2015

Links to Load Inflation tables

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.
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Last updated Feb 2017


Bridgestone\Firestone
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. I do note a LR-F in the St 235/85R16 size with a Max load of 3,960 @ 95 psi which might give some the margin they would like over the 3,640 @ 80 of the LR-E

Continental
Data book for commercial tires

Double Coin truck tire
Load & inflation for 19.5" and larger

 Firestone Truck Tires
Click on Resources to find list of tire Data books and Load Inflation tables for 17.5" and larger truck/bus tires

General truck tires
Load Inflation tables

Goodyear
RV tire information including link to Load & Inflation tables

Hankook Medium duty Truck tire info. Link will download their catalog with Load & Inflation info.

Kumho
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.

MAXXIS Trailer tires
Tire data on ST tires but no Load Inflation tables.

MAXXIS Trailer Load & Inflation tables

Michelin
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.

Omni-Trail
This importer is offering 75 mph speed rating on these ST type tires.

Sailun does not publish tables only the tire max load. They say to follow Tire & Rim tables. They do have some high load tires for trailers HERE. You will have to do some checking to find a US distributor. Note I have found some inconsistencies in their data so be sure to confirm with the dealer.

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.

TOYO
RV tire care and Load & Inflation tables. Also a good overview of info on tires HERE including Passenger Load Inflation tables that would be the same as or very close to the load infl for other companies.

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."

Yokohama   
Info on their commercial tires.  They have a "tool" that will calculate the minimum inflation for a specific axle load. Only problem I see is that they are assuming an exact 50/50 split which is not the norm for RV application.

 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.

General information


How to read a tire Load Inflation table
Barry's Tire Tech

National Highway Traffic Safety Administration
Tire Safety

File a complaint about a tire failure with NHTSA

Air Pressure, Temperature variation
Tire Rack

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

BigRig
Truck Scales

CAT Scales
Truck Scales

FifthWheel
General information and weight calculations for trailer owners


Please send me an email if you find one of these links is broken. Thanks


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2 comments:

  1. What do I do if the load inflation table does not have the weights for my tire size included on their table. My tire size is there but my load is not. The first closest number is 800lbs higher...

    ReplyDelete
    Replies
    1. Since you did not provide the size or load I can only guess. If your load is off the bottom of the list then use the lowest inflation on the list.
      You can send me email if you need more info
      Tireman9 at
      Gmail.com

      Delete

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