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We have a 2016 Challenger with the same tires. We installed after-market front-end steering stabilizer, rear-end sway bar and Sumo springs front & back. We use a TPMS as well. Typically, we run with 30 to 80 gallons gas and 25 to 75 gallons water. Typical highway speed is 55mph, very rarely over 60mph – gives us the best milage. We also tow a Honda Fit. With all that, we run all 6 tires at 90psi @ 70F. We have been doing that for 4 years. Pressure alarm set for below 81psi and over 120psi. Never had a problem. Tires are holding up just fine, handling has been just fine. We put on value extenders to make it easier to add air. Also purchased in a Viair air pump – love it. On really hot days going uphill we sometimes hit 125psi, but that is rare. Hope that helps.
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Challenger GT
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