Front and rear axle weight rating using 275/55R20 tires?

Can someone look on their door jam decal and see what the GAWR is for the front and rear axles using the 275/55R20 tires? I have gone to the 275/55R20 tirea and factory rims from my stock 255/70R18 tires and rims. My axle ratings are 4144lbs for rear and 4000lbs for the front. Thanks

 

Don't think you're magically going to gain anything. The weight ratings are specified separately from the tires, just google it. Something like 4000 front, 4150 rear.

 

Just checked my 2020, sticker says 4000 front and 4150 rear, I have 275/65/18 Michelin A/T tires.

 

I'm not thinking that I gained payload. I was just curious on how the factory rim and tire combination would change because the door jam gives the axle weight rating followed by the tire size. If it didn't make any difference on what tire Toyota put on why print the tires size on the decal with the weight rating?

 

Do you have a double cab? You weight ratings are almost exactly the same as my 2020 DC SR5 4X4 running the stock 255/70R18 tires.

 

Mine is a crewmax.

 

Huh. I have a 2017 4.6L DC with275/55R20 tire/wheel package but 20" tires/wheels were added at port (Gulf States Toyota) as part of the TSS package. The tire/wheel package is, in fact, the primary component of the TSS package.

Axle ratings on the door jamb are 3900 front and 4000 rear with 255/70R18 tires, just as the truck came from the factory.

The axle ratings probably don't change with larger tire size. By specifying the tire size, Toyota is actually saying that axle ratings are this much IF the specified size tire is the smallest tire size used. Once smaller tires are installed, the maximum allowable axle loadings become something less than specified ratings due to tire deficiencies.

 

I was actually thinking that the axles GAWR would be lower on the 20" rims and tires. My factory 20" rims/tires weight considerably more than my factory 18" rims/tires.

I'm surprised Toyota didn't give you a new decal to show the tires they installed.

 

My thinking is tire/wheel weight would not materially affect axle ratings in any way, bwdik.

The tire size specified reflects what Toyota thinks is appropriate for the trim level, and that specification implies a set of tire performance capabilities. Toyota is saying that given the capabilities of the OEM specified tire size, the axle rating is then derived from mechanical specification of the axle, i.e. allowable wheel bearing loading, axle shaft loading, differential bearing loading, axle housing loadings, design safety factors etc. They are not leaving the axle rating open-ended; change the tire size, and Toyota has covered their *** if axle rating ever becomes an issue (think litigation).

I don't believe the weights of typical tire/wheel set-ups would have much affect on axle ratings. Typical tire/wheel assembly weights are insignificant compared to axle ratings. For "Monster Truck" tires and wheels...Yeah, the user should go back and analyze expected loads on every axle component.