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
Tireman9 wrote:
The RV market (consumer) dictates that most buyers shop on price not long term quality. Else why do we have Harbor Freight and Walmart?
Few trailer manufacturers in the past have given the consumer an option for higher quarlity tires at time of ordering or retail purchasing. And as a matter of fact for want of just a few dollars per wheel they lock the consumer into LRE ST tires.
This is slowly starting to change. As a member of the Cardinal owners club we have gotten Forest River Inc to start using wheels rated for LRG tires and offer tires of that load range as a factory option.
So slowly we maybe getting away from a delivery and show OEM tires that performed poorly in actual consumer use.
Top this all off with manufacturers that that refuse to reissue a tire placard once a trailer is sold and they play into the future marketing of cheaply made low quality trailer service tires at consumer replacement time. Example: Trailers with 6k axles/GAWR with ST235/80R16E tires rated to 3420 pounds and placards denoting such. There are any number of LT235/85R16E and LT245/75R16E tires that will out perform the OEM ST tires hands down, no contest that meet the GAWR, but fall short of the inflated ratings given cheaply made ST tires(which is obtained with speed restriction).
Take one of the two LT tire sizes above and tag them with 65 mph speed restrictions and what load rating could they place on them?
Chris
