Tire Max Load rating and GAWR
I have searched for my answer and find bits and pieces but hopefully someone can answer me: I have a 2022 Silverado 3500HD DRW I will be towing a Keystone Fuzion 429 with MAX weight of 19k I want ...
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My question to these questions is, "WHAT" or "WHY" is your RA rating only 10500? Is it springs? axle itselfs rating. or rims or tires? Tires can be multiple issues. THe manufacture may use a tire that is good to the 15000 as you note 4 are good to at 80 psi, I am assuming. OR< they could be rated to 10,500 if you only have say 60 lbs in the tires! In this case, it will not matter if you tires are E/10 ply rated, or D/8 ply rated. That tire size at 60 lbs is good to 10500 total!
At the end of the day, it is better IMHO to have a bit more tire than spring, rim or axel rating. I've had more issues with tires at max ratings than the other parts I've mentioned.
Also, that size tire, ALL BRANDS and tread designs have the same max capacity. WITH THAT said or typed in this case. You will find some designs of tires, WILL be better for heaviest of loads ALL the time. Especially ones with steel sidewalls and tread, vs polyester sidewalls and steel tread compounds. Issue with these two designs, is the all steel case tire will weigh upwards of 10-15 lbs per tire. This extra weight does take some HP, along with an MPG drop. Amount will depend upon the motor and drivetrain you have. Ive had .5 mpg with an 05 DA DW going with Toyo M55 vs std Toyo AT tires. Both 215-85-16 LR E. My 1500, the 285-65 LR E tires are 15 lbs heavier than the stock P metric XL 265-65-18 tires. I lost close to 2 mpg, some due to weight, some due to an extra inch diam or 1/2" active radius. Being as the new ones are labeled AT, they really are a true mud/traction tire IMHO vs the stock ones being a HWY tread. ALL of these issues can make or break how a tire works or does not work etc for you.
My case, two of the tires you are looking at, or the two of the 285's I currently have, will handle the 8000 lbs of GVW my truck maxes out at. I run both tires at 35 front, and 30 in the rear. Otherwise the middle 9 of 11" of tread are in contact with the road at 80 lbs of PSI.
Probably more info than you need. Your tire capacity is plenty/OVER for the axle rating!
Marty
that GAWR 10500 rating is what is on the sticker inside the vehicle. I appreciate the info but still have the question about how the tire max load is calculated vs gawr.
