What pressure to run on aftermarket wheels and tires?

[rcorona]

Hey everyone.

I have a 2018 GT2 awd. The car came on the square 18" wheel setup. I got some new wheels and tires back in June 2022 and am wondering how to determine what pressure I should be running. Wheel and tire specs below;

Front Wheels - 19x8.5 +30
Front Tires - Conti ExtremeContact DWS06 Plus 255/35/19

Rear Wheels - 19x9.5 +35
Rear Tires - Conti ExtremeContact DWS06 Plus 275/35/19

Anyone run a similar setup? I run 36psi up front and 34psi in the rear but am having second thoughts because my TPMS light won't turn off after reinflation.

 

[Rodtheviking]

That is what I am running with the same tire. It also took a good long drive to get my TPMs light to turn off, want to say 40 miles or so. But you probably have a bad sensor, I went to Discount tire and they scanned for free and let me know I had two "new" sensors that were bad.

 

[rcorona]

That is what I am running with the same tire. It also took a good long drive to get my TPMs light to turn off, want to say 40 miles or so. But you probably have a bad sensor, I went to Discount tire and they scanned for free and let me know I had two "new" sensors that were bad.

I'll give it a long drive to see if it fixes itself. Really hoping I don't need new TPMS lol how much were yours to replace?

 

[Rodtheviking]

I'll give it a long drive to see if it fixes itself. Really hoping I don't need new TPMS lol how much were yours to replace?

They're about 20 each, not bad.

https://www.amazon.com/dp/B08LLGB5CZ/?coliid=I1XJQ2PZNONX6T&colid=3313QK6L78XGN&psc=1&ref_=lv_ov_lig_dp_it

 

[Clearly Canadian]

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

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[MerlintheMad]

Hi. I've had "adventures" this year with the TPMS system. First in early April my screen dropped and was replaced with the "Drive to Display" screen: was a dead RR TPMS sensor. The system refused to come back online and stay online, until I pushed harness connectors under the glovebox, then voila! it worked, for c. three months. Then the whole system came back online in July after dropping twice within a week, and hasn't misbehaved since. Electronics! Heh! Your psi is fine. The recommended is 38 front 36 rear, but above or below that isn't going to alter anything over the life of the tires, or affect handling in any noticeable way on the road (track of course is a wholenuther ballgame).