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So here's a couple pages from the owner's manual that came with my MY2018 Turbo w/PP factory equipped with 265/45R20 and 295/40R20 M+S (winter/all season) tires. It still isn't clear to me.
I think the rear pressure guidance is a bit higher than I need because it's accounting for passengers+cargo in the back. And the front pressure is just too squishy at 33 now that the weather is getting cooler.
I'm just going to set pressures by feel. Maybe I'll try 36 all around as suggested above.
So here's a couple pages from the owner's manual that came with my MY2018 Turbo w/PP factory equipped with 265/45R20 and 295/40R20 M+S (winter/all season) tires. It still isn't clear to me.
I think the rear pressure guidance is a bit higher than I need because it's accounting for passengers+cargo in the back. And the front pressure is just too squishy at 33 now that the weather is getting cooler.
I'm just going to set pressures by feel. Maybe I'll try 36 all around as suggested above.
The potholes over in Seattle must be a lot bigger than Bellevue. We only need 33 front and 36 rear during the pothole season. Next up, of course, is the snow season. What do you think is best pressure for your snow tires?
Its all about weight on seperate tires, and speed you wont go over for even a minute.
Determining the weigts for te different situations, is the most tricky part in it all.
But if you give the data, I am able to calculate pressure.
Once got hold of the officially used European formula, and went running with it.
Now use my own system wich is simpler and safer, and closer to laws of mother nature.
Can 3 # make such a huge difference? Do you check you tires every morning on extra hot or cool days?
What about starting out at 36 # in the morning at 70 degrees, the having the mid day high at 90 and a 100 mile trip at 70/80 mph?
Really ...
Just a bit OCD ?
I just go with the TPS readings....as long as they are in the "parameter" !!!
Can 3 # make such a huge difference? Do you check you tires every morning on extra hot or cool days?
What about starting out at 36 # in the morning at 70 degrees, the having the mid day high at 90 and a 100 mile trip at 70/80 mph?
Really ...
Just a bit OCD ?
I just go with the TPS readings....as long as they are in the "parameter" !!!
If you are running pressures near the low end of the range for comfort, then 3 # seems to make a difference as the weather gets colder - the steering gets sluggish and the car follows ruts in the road. I don't know if that's true for everyone or just for me because I have atypical wheels/tires on the car. For my car, the partial load setting for TPMS seems either too biased for comfort or it's calibrated for different tires than I'm using. I now want to run with a little bit higher pressure than TPMS advises to handle cold mornings before the tires warm up, but I don't want to run full load pressures or expect to be able to drive at 150MPH. I was disappointed by the relevant guidance in the owners manual for specific wheel/tire combinations.
OCD? Oh my, yes! I do check pressure every day (not accurately with a gauge, just using the TPMS readout) both when cold and when hot. I admit that I obsess over this stuff.
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