Atlee wrote:
I'd say your #2 is not always a given. My trailer has 205/75R14 LR-C Marathons on it presently. They are rated at 1760# each, or 7,040# total. My trailer's GVWR is 4,950#. Why do I need to get a higher load capacity tire? Now, if my trailer's GVWR was 5600#, I would want to upgrade the load capacity.
Heck, the combined axle weight is 5600#.
Lowsuv wrote:
All of these pages and still confusion ?
If you want to avoid blowouts and tread separation there are some basic things that can be done .
1. inflate to maximum pressure as shown on the tire sidewall .
2. upgrade to a tire ( any brand ) that has a higher load capacity in pounds than the current tires you have.
3. Check your tires each morning for PSI and road hazards . When towing at high speeds place your hand on the sidewalls to see if one tire is hotter than the others at each rest stop . If a tire shows cracking replace it .
4. the ST tire is the weakest link. you will gain reliability by using a 2520 pound load rated tire even on an 1800 # capacity wheel . you still can only carry 1800 # but the tire itself has more and better cords and construction . Run those higher load range tires at the increased PSI shown on the sidewall.
The advantage is that if you start with 65 psi and your tire deflates to 50 psi during that day's trip you still have the same weight capacity as your original 50 psi tires .
5. tire rack charts are your friend . one can compare different tire sizes , Load Ranges ( C , D, E ) and load ratings in pounds versus tire diameter and width .
6. LT tires are load rated to a tougher standard than ST tires . Because of this an 1820 # load rated LT tire is a tougher tire than an ST tire rated at 1820 # . But if you can only get an ST tire then go up in load capacity to say 2271 # or 2520 # or 2830 # based on what is available in an ST .
7. brand is less important than upgrading to a higher load rated capacity tire . A higher load range such as E or D is your friend .
The advantage to going to a load range D, higher pound capacity tire would be likely cooler running temperatures, and more "reserve capacity" in pounds.
The advantage to using a LT tire would be considerably more "reserve capacity" in speed rating.
In your case, you may not feel any of these attributes are worth giving attention to, so in that case using ST tires on your trailer might make perfect sense to you.
As always, "your mileage and experience may vary".