Forum Discussion
Me_Again
Dec 04, 2013Explorer III
TomG2 wrote:
The grey area is the difference between the sum of the axle ratings and the total vehicle rating(GVWR). Using the axle ratings alone, all the builder would have to do is put a heavier rated rear axle under their vehicles to raise their GVWR? I don't think it works that way. Otherwise, they could put a 7,000 pound rear axle under a F-150 and raise the rating to over 10,000 pounds? More goes into the gross vehicle rating than simply axle ratings.
The rear tires are what sets the RGAWR. AAM units on the Dodge and GM are rate to over 10K(10800 to 11500 depending on where you look).
That was true even back in 2001 on my Dodge with a Dana 70 axle rated to 8580 pounds, those with Dana 80 have a rating of 10100.
My Rear GAWR is listed at 6084 or two times the standard LT245/75R16E tires rated to 3042 lbs. However the truck came with the factory optional LT265/75R16E rated to 3415 each!
Those with 3042 rated tires can push that limit with a mid size 5th wheel.
Only on RV forums do people get so rapped around the axle on these issues!
Chris
About Travel Trailer Group
44,051 PostsLatest Activity: Oct 02, 2025