Members are weighing the pros and cons of switching from G rated (14 ply, 110 psi max) to H rated (16 ply, 120 psi max) Sailun tires on rigs with rims stamped for 110 psi. The main concern is whether it’s safe or beneficial to use H rated tires when the rim’s pressure rating is lower than the tire’s maximum. Several RVers report running H rated tires at lower pressures (90–110 psi) without issues, emphasizing that tire pressure should match the trailer’s actual weight, not just the tire’s...
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Members are weighing the pros and cons of switching from G rated (14 ply, 110 psi max) to H rated (16 ply, 120 psi max) Sailun tires on rigs with rims stamped for 110 psi. The main concern is whether it’s safe or beneficial to use H rated tires when the rim’s pressure rating is lower than the tire’s maximum. Several RVers report running H rated tires at lower pressures (90–110 psi) without issues, emphasizing that tire pressure should match the trailer’s actual weight, not just the tire’s max rating. Some have completed long trips on H rated tires at reduced pressures with no problems, while others plan to upgrade for added safety margin and stability, especially in hot climates or with heavier loads.
There’s consensus that H rated tires offer stiffer sidewalls and higher load capacity, but most agree you don’t need to inflate them to 120 psi if your rims are rated for less—running them at 100–110 psi is common. A few members have upgraded to 17.5" H rated tires for even greater capacity and stability, but note this requires new wheels and sometimes larger studs. The upgrade is seen as part of a broader suspension improvement for those carrying heavy loads or traveling in extreme conditions.