Hi cummins; I’ve been in the habit of replacing both tires on an axle; may not need to, but the habit has worked for me. My trailer weighs ~18,300 with about 3800 pin. That leaves ~14,500 on the 4 tires; or about 3600 each, some are less than that. According to the inflation chart, 100 psi is good for 4020 pounds.
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2017 36RSSB3--2012 F350 KR, LWB, SRW, bilsteins, 1 1/4" anti sway bar, bilstein steering stabilizer, airlift air bags, on board wireless compressor, 295/20 tires at 4080 pounds each, oversized finned aluminum diff and trannie pans, all synthetic fluids; KEM, Tyrant, and PIP tunes with SCT X4 programming, G37 2017 Turbo, ATS Stage I towing transmission and torque convertor, Edge CTS gauge monitoring.
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