Lowsuv wrote:
Speaking as a "car guy " that regularly attends Porsche Club Of America tire tech sessions I can say that it is a simple basic truth that the tire speed rating is an indicator of tire quality and safety .
That may not be common knowledge to those that are not motorheads .
To take the position that a 65 mph rated tire is as safe as a 106 mph rated tire means that the buyer is ignoring the information readily available on the sidewall and the manufacturer's specs .
Regarding 14 inch tires the choice is fairly clear for me .
The Tire Rack has the specs and load ratings for many tires .
The Kumho 857 in a 205 R 14 C has a load rating of 2271 pounds . This is about 10 % higher than other tires in a 14 inch diameter . That particular tire is also a Q speed rating which is 99 mph .
http://www.tirerack.com/tires/tires.jsp?tireMake=Kumho&tireModel=Radial+857&sidewall=Blackwall&partnum=0R4857&tab=Specs
And for a little further info on the Kumho 857, this is what I did on my trailer. The factory had fit 205/75-14, load range C ( 1760 lbs @ 50 psi ).
In my case, I "just" had room above the tire at full suspension bump with that size, so I could not go to any tire that was larger in diameter.
My choice was the Kumho in 185-14 ( which is an 82 series section height ). This tire is just slightly smaller in diameter ( two tenths of an inch ) than the 205/75, and puts approx 9mm less tread width on the pavement. It is a load range D (1874 lbs @ 65psi ), so I increased my load capacity by 114 pounds per tire ( 456 lbs total increase ) and I have a tire that is speed rated to 99mph.
Win, win situation in my opinion.
Many of the smaller trailers come with this 205/75-14 size as OE from the factory.