Originally Posted by SKnight
So let me say this clearly. If the tire (And wheel since we're dealing in absolutes.) can take 80PSI and the trailer sticker specs 65. You may have them aired up to 65, which is spec. Lo and behold, put 80 in. That will help reduce sway according to sources because, the HIGHER PRESSURES AND STIFFER SIDEWALLS OF ST TIRES REDUCE SWAY!!!!!!!!!!!
The reference you are using is comparing ST and LT tires to P series metric and passenger tires. ST and LT tires are made with stiffer sidewalls and higher pressures for the load range
"as compared with "P" series tires".
80 PSI tires are load range E; 65 PSI tires are Load range D.
If the camper has load range E tires on it (and the sticker says 65 PSI on it), the OEM tires would have had to have been replaced by the owner with the higher load range ones.
Trying to put 80 PSI in a 65 PSI OEM D range tire is as stated before "dangerous;" but I don't think that is what you are recommending.
Sway (with the correct tires, inflated to the placard pressure), can not be cured by changing the proper tire pressure for the load.
In fact, over-pressurizing a tire for the load will reduce tread in contact with the road surface (wear patterns for over pressure for load clearly show this) and can increase sway tendencies as stated previously (as does under-inflation and for the same reason).
Stating "not to exceed" the sidewall pressure is a "quibble" because most OEM tires are placarded to be inflated to the max so as to ensure it is capable of handling the load at it's GVWR.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
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