Tire pressures
This has probably been asked before but because we are leaving in the AM for the summer I need quick advise from the folks on here. We have a 2013 Ford F350 SRW 6.7L Diesel and a new to us 2016 Key...
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TXiceman wrote:Retired JSO wrote:
65 psi was for a D rated tire. The new tires are E rated and 80 PSI. Run the new tires At 80 cold. As temperatures warm, you may need to adjust the cold PSI.
You need to weigh the RV and adjust the tire pressure to match the manufacturers weight loading chart. Add 5 psig to the rated pressures. Also watch tire wear patterns for center or should wear which would indicate over or under pressure.
Operating the tire at maximum pressure could cause excessive center wear and an excessively rough ride.
And you do not adjust pressures as the tires warm during the day. Tire pressures are set according to pressure after the rig has set for 4 hours and no direct sun on the tires. I usually set my pressures first thing in the morning. As the seasons warm or cool, you will need to make seasonal adjustments of your starting air pressure.
Ken
Dang I thought I was reading one of my posts. Nice to see several are understanding how to properly inflate tires.
One thing to add is overinflation will cause reduced braking with a smaller contact patch.
Just made it to my NW Summer digs and now have 67,000 miles on my 6 Michelins on my truck. Without proper inflation that would not have happened. OH, also my 4 rear tires are carrying 10k near 1/2 of those miles.
