How often u guys fill the tires air?

[BRZnut]

you guys should all check your tires once a month, especially when it starts to get cold. And, get a good digital gauge and your own electric tire air pump. I noticed that the light comes on at 28 psi.

[ZionsWrath]

Maybe they enjoy watching the light go on and off as well as uneven tire wear.

[clfan]

lol.
the light goes off now.
really its the temp difference.

[Annahra]

If you are getting a TPMS light from air temperature change, your tires are probably borderline. I would check them and add air. I never have to add air with the BRZ because I switch out from winter tires to summer tires and back seasonally, but with the all seasons on my Genesis I would only see the light when it started to get cold. I usually had to add air once temps hit about 40* and then again when they hit about 25*.

[Ganthrithor]

You shouldn't have to add air at all frequently unless there's a problem with the tyre or a very noticeable temperature change. You should buy a gauge and measure the pressures when you stop for fuel, though (at least once a week). Then if they're off at all, you can just adjust them at the gas station before you leave.

Also, it's important not to rely on the TPMS light, because handling can be significantly affected well before the light triggers. Over- or under-inflating your tyres can significantly change the amount of grip available, as well as cause your tyres to wear unevenly, causing you to have to discard them early. Also it can hurt gas mileage. It's a much better idea to just spend the few bucks + two minutes at gas stops to make sure they're right.

[extrashaky]

Originally Posted by MGPAX

That being said and the car being light, I raised mine to 40 and I like the way they grip better and the way the car drives better. Not much difference in roughness either.
You can tune your front to rear bias by putting less air in the back for a more tail happy car. I do this....makes the rear come around in a corner more like I want....

You sure you didn't get that backwards?

[Andrew025]

Originally Posted by extrashaky

You sure you didn't get that backwards?

He isn't, but everyone else is.

[MGPAX]

What I'm saying is that it's been my experience that these tires are under inflated at 35 pounds. And I believe I get better traction and more predictable handling with the front at 40 and the rear lower, about 36.

I may be imagining it! I understand that too much air is less traction....But so is not enough. And if these guys are driving around at 26-28 lbs, I'm thinking they're riding on the sidewalls of their tires.

[chrisl]

Originally Posted by extrashaky

You sure you didn't get that backwards?

I don't know - I might be willing to believe that. My Cayman understeers like mad at factory pressures (32 front, 39 rear), but if I change it to ~38 all around (higher front and slightly lower rear than stock), it is a lot more balanced and has way better front grip. Lower pressure isn't always better for grip.

[Ganthrithor]

One way to know for sure: chalk the tyres and go driving / experimenting until they look right.

[imom]

Originally Posted by MGPAX

The stock tires are rated at 50lbs psi max. That being said and the car being light, I raised mine to 40 and I like the way they grip better and the way the car drives better. Not much difference in roughness either.
You can tune your front to rear bias by putting less air in the back for a more tail happy car. I do this....makes the rear come around in a corner more like I want....

These are prius tires and the prius only weights a few hundred pounds more than BRZ. The factory settings is 36 PSI if I remember right. I would not go to 40 lbs and over inflate your tires...it's going to put extra wear on the center of the tire. It's your car and your safety, but I would not go over factory limits of the tire manufacturer. 40 PSI cold plus temperature changes on top of any other impact (I'm no expert) but seems like a bad formula to me. Why cause premature wear and potential tire blow out or separation?

I inflate my tires about every 3 months or so with regular air.

[s2d4]

Originally Posted by MGPAX

The stock tires are rated at 50lbs psi max. That being said and the car being light, I raised mine to 40 and I like the way they grip better and the way the car drives better. Not much difference in roughness either.
You can tune your front to rear bias by putting less air in the back for a more tail happy car. I do this....makes the rear come around in a corner more like I want....

Are you related to suberman?

[Marco_86]

Yeah probably heat related, I'm another la guy that had the light go on a few days ago

[AznBRZer]

I only check when I swap out the stocks for winter and vice versa. No issues with the light so far.