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