Originally Posted by twinster2
From a safety stand point, trailer tires are speed rated to go no faster than 65 mph. As for me, I found that the best speed from a mileage standpoint was about 62 mpg.
Yes, 65 mph speed rating unless running Goodyear Endurance or Maxxis which have a higher speed rating as indicated below:
"You’ll find the Endurance available in a number of 14-16 inch sizes with N-speed ratings, which is a step above the standard L or J rating found on most other trailer tires. Goodyear has also included a new ST 255/85R16 size. All sizes come with a limited tread warranty."
"On Maxxis M8008,
"High Speed" is used to differentiate the M8008 ST Radial from other products we offer that are intended for industrial and/or commercial use, in slow speed applications. The Maxxis M8008 ST Radial carries a "Q" speed rating. However, according to the Tire and Rim Association, the U.S. tire industry specification authority, inflation pressures and load specifications in general for any ST Radial trailer tires without a service description, regardless of the manufacturer, are designed and rated at 65 MPH. However, if the speed is higher than 65 MPH, the pressure and load need to be adjusted according to the following guidelines:
From 66 to 75 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) but requires no load adjustment.
From 76 to 85 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) and load should be reduced by 10%.
We hope this information is helpful. Thanks for your inquiry and interest in Maxxis Tires.
Your Maxxis Support Team
Maxxis International – USA
| Web: maxxis.com"
Tire Speed Rating Chart
Speed Symbol Maximum Speed Vehicle Type
L 75 mph Off-Road & Light Truck Tires
M 81 mph Temporary Spare Tires
N 87 mph
P 93 mph
Q 99 mph Studless & Studdable Winter Tires
R 106 mph H.D. Light Truck Tires
S 112 mph Family Sedans & Vans
T 118 mph Family Sedans & Vans
U 124 mph
H 130 mph Sport Sedans & Coupes
V 149 mph Sport Sedans, Coupes & Sports Cars
W 168 mph Exotic Sports Cars
Y 186 mph Exotic Sports Cars
Z 149 mph +
* W- and Y-speed ratings are subcategories of the Z-speed rating.
However, for my safety and that of other drivers plus better fuel mileage and reduction in wear/tear on the tow vehicle and the camper, I travel in the 60-65 mph speed range.
Next spring I will be replacing the 4 tires on my 2012 toy hauler that has the original tires on it with plenty of tread but slightly weather checking evident.
I will replace with either Maxxis or Goodyear Endurance ~ not that I will drive faster but will appreciate the additional margin of safety.