At what psi can I travel 65-75mph?
This Maxxis pdf has the same table. Using the table(s) above, my ST175/80R13 with 1060lbs load could run at a minimum 35psi with ~4% reserve capacity. Is there a +10lbs rule? I run with +1...
Forum Discussion
JJBIRISH wrote:
Believe what you will, the ST tire DOES NOT MEET THE SAME testing and safety requirements as the other highway tires do… and IMHO they are not as safe as P or LT tires…
§571.139 Standard No. 139; New pneumatic radial tires for light vehicles. S1. Scope and purpose. This standard specifies tire dimensions, test requirements, labeling requirements, and defines tire load ratings . S2 Application. This standard applies to new pneumatic radial tires for use on motor vehicles (other than motorcycles and low speed vehicles)
I guess that means that every motorcyclist on earth is doomed, because that/those tires are excluded from the standard, too. Unless of course certain tire types are excluded due to design/mechanical differences making them incompatible with this set of standards. ;)
ST's exclusion from this rule does not mean they're "less safe".
The fact of there being no restrictions per passengers riding in trailers equipped with them seems to me to be better proof of their "safety" than popular opinion.
This of course assuming they're used within all design parameters.
