Lynnmor wrote:
Ltrip wrote:
Then.....I did some Googling. Load RATING is also known as Load INDEX.
The salesman was wrong on the size of the difference.
The GY has a load index of 123 which carries 3417 lbs
The Maxxis has a load index of 124 which carries 3527 lbs.
110 lb difference, not 500.
Perhaps the speed rating is higher with the Goodyear and the load index takes into account the higher speed. A tire engineer might be along soon to clarify the difference.
Unless maxxis has changed the tire ratings, the Goodyear has higher speed rating, 87mph vs Maxxis which between 65 and 75 mph says you must increase pressure by 10psi but not exceed max sidewall pressure and between 75 and 85mph also decrease load for the psi by an additional 10 percent. so, even between 65 and 75 you can't go with the max load rating, since you must stay below the max sidewall pressure.
BTW goodyear had the same derating for the old marathon's. And IIRC carslie and others had or have similar deratings statements.
Whereas the goodyear load index is for speeds up to 87mph.
Now if you tow, like we do, around 65mph it's a moot point, you'll be following the sidewall load rating for 65mph which is in favor of maxxis etc.
But if you tow faster, the difference may actually be in favor of the goodyear rather than maxxis/marathon etc. unless maxxis and others recently changed the load index and speed ratings.
