Greetings Dave and Brenda!
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
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!
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.