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Member
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Join Date: Sep 2015
Location: South Carolina
Posts: 34
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Member
Join Date: Sep 2015
Location: South Carolina
Posts: 34
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Tire inflation pressures
I just did the chalk test on my 5th gen 4Runner with nitto Ridge grapplers 255/80R17, new tires, load range E. I have all tires inflated to 32 PSI cold pressure. The chalk test on the front tires showed perfect even wear across the tread. The chalk test on the back tire showed more wear in the center of both rear tires as opposed to the outside. This inflation pressure is the recommended inflation pressure for the stock vehicle, but I've added extra weight and I have changed the tires to load range e versus a passenger tire. I don't really want to reduce the pressure more than that, but the chalk test results suggest I should reduce it in the back tires. I assume this is because of the higher weight on the front end versus the rear despite having cargo in the rear at the time of the test. Additionally, it seems in most vehicles that the pressure is recommended to either be the same all the way around or increased in the rear tires and comparison to the front tires if there is extra cargo. Again, this test was done with a moderate amount of cargo in the rear. What would y'all advise?
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2016 Toyota 4Runner TRD Pro Quicksand - Gobi Stealth Rack & ladder - OPOR/Metaltech TRD Pro Rock Sliders - Custom Cargo Track Bin Storage on Sliding Rear Deck - Scosche Phone Mount - 3" Lift from Radflo 2.5" Coilovers 700 lb Springs w Remote Reservoirs front & 2.5" Radflo in back w Toytec 2" RCC2.0 rear Springs - High clearance bumper cut - Warn Semi Hidden Winch Mount - Warn VR Evo 10-S - Factor 55 Flatlink Expert w Rope Guard - 255/80r17 Nitto Ridge Grapplers
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