Tire Pressure Recommendation for 19" Wheels & Tires

[914rrr]

I have what I think are 8.5x19 and 11x19 Champion RG5 Monolites on our 2004 996 Carrera. IIRC, tires are 235/35/19 and 295/30/19 Michelin Pilot Sport N1's. The tire label on the gas door says 36 psi front and 44 psi rear. Would these pressures be correct for my larger wheels and tires?

I also would occasionally use the car for DE's and autocross. Would the pressures need to be raised for track use?

[02tx996cab]

Check with someone who has a 997...they came with a 19" wheel option. Use what is recommended for the 997/19" and tweak up or down from there based on how the car feels and how the tires wear. As for DE/track, get advice from your fellow drivers at these events for tire pressures and see what works and feels best for you. (Likely, those pressures will be a bit lower than for normal street use.)

The 36/44 inside the gas filler door of your 996 are for the 18" wheel option for that car.

[wross996TT]

When I had my 19s mounted the tech said in order to get the same pressure as with the 18s I would need to go higher in pressure...I don't know why, but I have found lower to be better. I run about 34/42. On the track, your cold tire pressure may be significantly less. As mentioned above watch tire wear and if you can tire temperature profiles. Most folks run about 4-6 lbs. less.