Greetings Dave and Brenda!
Quote:
Originally Posted by Skellington
Thanks very much for your input and information!! Very much appreciated! Please explain for me what exactly is needed for trailer vs. Automotive tires? What will I be looking for? I take it they will be labeled ST or Trailer on them? Is the size right? Meaning the 165/70? Or should I be looking for something else?
Thank you again!! Dave and Brenda
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The following are a few of the differences between trailer tires and automotive tires:
- Sidewalls are heavier than passenger tires.
- Tread ply rating typically is either 6-ply or 8-ply rated rather than the 4-ply that is typical for a passenger tire.
- The rubber compounding is different on trailer tires to compensate for the long periods of inactivity typically experienced by trailer tires.
- Trailer tires are typically rated to carry significantly more weight than a similar sized automobile tire.
Due to variations in coach construction (wheel well size and axle placement relative to wheel well) it is difficult to give a precise size designation when the tires currently on the coach are not of the correct. It is usually best to select a tire with a carrying capacity that gives you at least a 20% margin of safety above the maximum gross vehicle weight rating of your coach. With a Vintage coach measuring is almost a requirement when purchasing new tires to be certain that they will fit within the wheel wells and have a rating to carry the coach's maximum weight.
I have friends who have switched their Vintage Bambis over to either 14" or 15" wheels to take advntage of tires that are easier to find or have a higher carrying capacity.
Good luck with your investigation!
Kevin
P.S.: The sidewalls will be labeled ST and the load range should be labeled as B, C, D, or E. It is unusual to find greater than a C load rating for 13-inch ST tires.