Trailer tires
We have a dual axle travel trailer with 13" wheels. On our last trip blew one of tires. I started doing some research and found that these are ST rated tires which I think means they are rated to 65 M...
Forum Discussion
MarkTwain wrote:
IMHO, driving a trailer with 13" wheels at 65mph is a "tire problem" waiting to happen. Can you you use bigger rimed wheels on your RV i.e. 15". ? Would make a big difference.
JIMNLIN wrote:
Excellent point.
Back when the national speed limit was 55 mph 12"-13" trailers tire started showing up on mostly boat trailers and small rv and non rv trailers.
Even at 60-65 mph there really turning very high rpms........rpms carrying a load = lots of heat in this small tire.
I would slow down or if possible upgrade to a 15" P or LT or stay with the new gen higher speed rated ST tire.
Lynnmor wrote:
"Keeping up with traffic" and 13" trailer tires doesn't mix. You will not find a quality ST tire in 13", so slow down or park it.
These are very amusing statements but seem to be the norm here. Maybe with 8" or 10" rimmed trailers these MIGHT be true but a 13" rimmed trailer tire is perfectly safe. I would look for a 185/80/13 LR D tire with a higher speed rating. The higher the speed rating, generally the better quality tire you have.
The difference in tire speed from a 175/80/13 and a 205/75/14 tire is about ~5mph, and about ~8mph for a 205/75/15. I don't think that would cause the tires to explode and the world to come to an end....
Original Tire Size
205/75R14
New Tire Size
175/80R13
Speedometer Reading
65
Calculate
Actual Speed
59.81
Original Tire Size
205/75R15
New Tire Size
175/80R13
Speedometer Reading
65
Calculate
Actual Speed
57.61
ScottG wrote:
I would start by keeping the air pressure at hte max stated on the side wall regardless of load.
^^^^^Best advice you can get ^^^^^^
Adam
