Tire Pressure
Driver School Candidate
Joined: May 2020
Posts: 16
Likes: 7
From: GA
To be honest it not too much rougher, just on potholes going slow you feel the tire rebound harder. Going +30mph you dont really feel a difference. The cc2's are an expensive tire, and my first set only lasted around 35k miles before they refused to evacuate snow from the side tread sipes which made them kind of useless in the snow. Sucks as the middles had plenty of tread, my current set at 45 psi is at 55k miles and 6/32nds given 80% of my commute is highway miles. For my next set Im planning on getting them in 265/50/20 and running 33psi and see how they wear. But 265's are 5 pounds heavier than the 235's so mpg will suffer and 5 pounds of rotational inertia will definitely wear the suspension and brakes at a more accelerated rate.
for my stock 235/55/20s I run them at 35 cold- seems to corner better for me (33 cold sometimes feel like I roll onto the sidewalls when I turn). They heat up to about 38 on the highway.
Last edited by ashilcoski; Feb 8, 2025 at 10:53 AM.
Intermediate
Joined: Apr 2017
Posts: 432
Likes: 114
From: NorCal
My goal was to hit 40 psi when driving and that's what I got, however I think it will go to 41 when driving on the freeway. It was 36 degrees here this morning, last week it was 47 so it's difficult to set the pressure in the AM and end up with 40 psi in the afternoon. What I did was set it to 38 psi in the afternoon to get 40 when warm. If I had to guess it would have to be set to 36 (+or -1) in the morning to get 40 psi when driving.
I have a '17 and the front end seems to be wandering a bit for example coming down a curvy road at 70 mph so I have been driving in S+ and that cures it. I'm hoping that the higher pressure will help this issue.
I have a '17 and the front end seems to be wandering a bit for example coming down a curvy road at 70 mph so I have been driving in S+ and that cures it. I'm hoping that the higher pressure will help this issue.
I've tried 40 PSI when tires are warmed up and I lose traction on curvy bumpy roads. It was also uncomfortable. Therefore, I had set it back to factory spec 33 PSI COLD. Keep in mind these are with the factory Michellin's Premier LTX. So with a different tire model such as the CC2, it might be different. I also heard the CC2 gives a softer ride. So bumping it up a few PSi maybe worth it.
Intermediate
Joined: Apr 2017
Posts: 432
Likes: 114
From: NorCal
I've tried 40 PSI when tires are warmed up and I lose traction on curvy bumpy roads. It was also uncomfortable. Therefore, I had set it back to factory spec 33 PSI COLD. Keep in mind these are with the factory Michellin's Premier LTX. So with a different tire model such as the CC2, it might be different. I also heard the CC2 gives a softer ride. So bumping it up a few PSi maybe worth it.
Pit Crew
Joined: Jul 2019
Posts: 248
Likes: 96
From: CO
265/50/20 sounds wide and I like it. It’s probably an XL rated tire though so you’ll want to prob add more air than 33 psi. From my understanding the XL tires require higher pressure due to the construction of the sidewall (which allows for increased load). Either way- would love to see pics if you go with that size.
for my stock 235/55/20s I run them at 35 cold- seems to corner better for me (33 cold sometimes feel like I roll onto the sidewalls when I turn). They heat up to about 38 on the highway.
for my stock 235/55/20s I run them at 35 cold- seems to corner better for me (33 cold sometimes feel like I roll onto the sidewalls when I turn). They heat up to about 38 on the highway.
ok so dont get the cc2 in 265, everyone says they fit which they do but they rub slighty with the steering wheel full locked and also going over massive bumps that make the rear suspension squat. Crazy how no one mentioned this
go with the 255’s
Instructor
Joined: Feb 2021
Posts: 835
Likes: 408
From: PA
I live in Phoenix AZ where it gets very hot during the Summer. The Lexus Door recommended PSI for my RX350 is 32. One Lexus dealership says should have 28 PSI and a second says 36 PSI. I know the temperatures can affect tire pressure. Of the three 28, 32, or 36 is correct. Or perhaps change when it is cooler than hotter?
Last edited by jcg0324; Apr 4, 2025 at 07:56 AM.
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