Do I need D tires?
Would I gain much by using load range D tires on a 4500 lb GVWR dual axle trailer? My current load range C tires (Karrier Loadstar 205/75 R 14) have held up well. They have a 1760 lb load rating, w...
Forum Discussion
JIMNLIN wrote:owenssailor wrote:
Regarding the comments about heat buildup and rolling resistance above.
Think of your vehicle tires. P metric tires are rated for say max 44PSI. The vehicle sticker calls for 36PSI for the weight of that vehicle.
Do you inflate to 44psi anyway because that is the max? I think not.
The same applies to trailer tires.
Lightweight P tires on a 1/2 ton truck vs a heavy D tire on a 4500 lb tandem axle trailer with 1125 lb per tire load requirement....pickles vs watermelons in several ways.
The issue regarding loading is the same for the various types of tires. The tire companies publish inflation tables for their tires to show what inflation is needed for a given load. You do not have to run the tires at max pressure depending on the load regardless of the tire type.
The C tires put on many trailers must be inflated to the max 50PSI to get to the required load rating of 1760lb. The Endurance tires with a max inflation pressure of 65PSI gets the same load carrying capability as the original C tires if inflated to 50PSI
A big advantage to using tires like the Endurance is the max speed rating of 87MPH. This gives a good margin compared to the tires rated for max speed of 65MPH.
Here is the link to the inflation table so you can check out what Goodyear has to say about their tires.
https://www.goodyearrvtires.com/pdfs/rv_inflation.pdf
