[joeprocopio]

My dealer inflates to 38, but their gauge is definitely off because it's really 40 on my ANSI certified Jaco digital gauge.

the manual states 33psi. so I put 33 in cold (which since the temps here in Myrtle Beach have been kinda crazy lately, I have to check often and adjust), but have run 35 as well...ride is stiffer at 35 as is expected, but I haven't really tested the wear pattern at different psi, so I'm just curious what others here are running their pressures at, and what type of gauge are you using (or are you just relying on the people who service your tires and never check them, lol.

 

[RoLleRKoaSTeR]

I tend to put in about 38 in mine. Still have the stock Dunlop tires still. I try not to drive it on I65 South from Louisville as I have seen truck trailers get a foot airborne in the back from the sinking and broken concrete.

 

[zx10guy]

My 2 cents is playing around with tire pressures is akin to playing Russian Roulette. The manufacturers have gone through a lot of R&D to come up with the recommended tire pressures. Unless you have a very specific reason and evidence as to why changing the tire pressures is needed, I'd follow the manufacturer's recommendation.

Changing tire pressures even a .5 PSI will affect something with how your car performs. How much is based on your driving and road conditions. Bumping up 5 PSI is a lot. Not only are you drastically changing the contact patch of your tire, you're also affected how much side wall flex/give the tire is going to have. And we're talking about static cold pressures. Drive for a bit the pressure in that tire is going to go up through to heat generation from the friction between road surface and the tire; further altering the tire contact patch and the flex/give of the side wall.

I run all my vehicles on the factory recommended tire pressures.

 

[joeprocopio]

I run all my vehicles on the factory recommended tire pressures.

I assume you still run stock sized tires, yes? I am currently running 33 and checking weekly for any variance.

When I ran oversized tires on my jeeps it was always a battle finding the right pressure, too much, ride as rough, too little ride was sluggish.

I mainly ask because for some unknown reason my dealer puts WAY TOO MUCH air in them, and was just curious if anyone had found any reason to run anything other than the recommended.

Weird thing is that on my wife's FWD Corolla Cross, they recommend 33 in the front and 29 in the rear.

I'm just going to have to watch for wear and go from there (probably do the chalk test one day)

 

[zx10guy]

I'm not running the stock tire size anymore. I'm running a set of Michelin Cross Climate 2 tires which don't have a tire size for the 195/60 17 tires that came stock with my LE. I'm running 225/55 17s with the Cross Climate 2 tires. Still using the 33/33 pressures with no issues.

My BMW 135i calls for I think 36/39. That car I kept the rear tire the same at 245/35 18 but upsized my front to 225/40 18. I'm also running the stock pressures there. Same goes for all three of my motorcycles.

You'll have to ask the dealership as to why they are choosing to run such higher pressures. I don't have a reason why. The only thing I can think of with running higher pressures is decreasing the contact patch to increase fuel economy or if you're loading down the car.

 

[joeprocopio]

gotcha...yeah the only reason they told me when we got the cars is that because it was cold, adding higher PSI would mean the tires wouldn't get too low overnight. then it got warmer in Myrtle Beach, and they still put 38 in my C-HR...haven't had the Cross in again for service yet, soon...5000 miles coming fast

assume by no issues you mean no weird tread wear going on.

funny about the bike tires, lol.

I don't need higher pressures for better gas mileage, I only work 12 miles away so they don't get too much higher than cold temp in that time, (50mph mostly)...temp only increases by 2psi by the time I get to work and I'm getting 33+ on my commute, sometimes 36+.

what I do find weird on the Corolla Cross with the 33/29 recommendation, is the AWD version says 33 all around. not sure if the tire size is different between AWD and FWD, but the rims sizes are different between the LE and XLE so the tires are technically different between trims, time to check out the specs again, lol.

 

[zx10guy]

If the temperature change is that drastic, you should be checking the tire pressures anyways. Inflating the tires way up like that to cover those instances is just asinine to me.

As a side bar, it's actually good practice to be checking your tire pressures periodically. For a perfectly sealed tire to the wheel, there is an expectation you'll lose some air over time. I ran across some information that stated what the rate ideally would be. I don't remember. The reason TPMS systems came out was because many drivers were too lazy to check their tires (let alone do proper routine maintenance) and this was causing all the tire failures due to underinflated tires. And of course in the great American way, these idiots were blaming the manufacturer of the car and tires for their negligence. So TPMS was invented to skirt liability. But even with TPMS, many systems won't tell you how much pressure is actually in the tire in real time and will only throw a warning light if the pressure drops below a certain threshold. Other systems will tell you but it's only valuable if you actually look at the readout. My C-HR and I suspect all the others does not give actual pressure readings of each tire. Nor does my 135i. My two BMW motorcycles do give actual readouts. But motorcycle riders a different as we tend to check our tire pressures often. You have an issue with one tire on a car, it's an inconvenience. You have an issue with one tire on a motorcycle, and you're having a really really bad day.

 

[joeprocopio]

If the temperature change is that drastic, you should be checking the tire pressures anyways. Inflating the tires way up like that to cover those instances is just asinine to me.

agreed.

Oh I check mine constantly. something I have always done.

So if you have the Toyota App, as long as you have the "Connected Services", it shows you in the app. once you no longer have that (2 years for free, most people don't continue it) that functionality disappears.

There is a device that you can install from AliExpress, that will show you current PSI, not sure how reliable that is though.
AliExpress TPMS

The Cross has a screen in the info area that shows PSI, for that I'm jealous, lol.

 

[zx10guy]

agreed.

Oh I check mine constantly. something I have always done.

So if you have the Toyota App, as long as you have the "Connected Services", it shows you in the app. once you no longer have that (2 years for free, most people don't continue it) that functionality disappears.

There is a device that you can install from AliExpress, that will show you current PSI, not sure how reliable that is though.
AliExpress TPMS

The Cross has a screen in the info area that shows PSI, for that I'm jealous, lol.

That's good you're checking your pressures constantly.

I think Connected Services is only available in the two upper tier trims. Mine is bare basic the way I like it. And with the way Toyota has been with their lousy Infotainment development, I'm not sure I would even want it. The other thing is Toyota is quietly trying to nickel and dime us to death. That crap Scout GPS navigation app....they think we'll actually pay for it after the 3 year trial period is over. And I'm not sure if you've seen the recent headlines. Toyota quietly put in a subscription model for their remote start feature with recent cars. It'll work for I forget 2 or 3 years and after that, you have to pay to keep the remote start active.

 

[joeprocopio]

I believe I read somewhere they rescinded the remote start subscription, but could be wrong... Don't care because neither of my Toyotas have it lol.

And I use Android Auto and Waze/Google Maps for navigating so unless they start charging for AA or CarPlay... I'm good there too lol.

 

[zx10guy]

I believe I read somewhere they rescinded the remote start subscription, but could be wrong... Don't care because neither of my Toyotas have it lol.

And I use Android Auto and Waze/Google Maps for navigating so unless they start charging for AA or CarPlay... I'm good there too lol.

They very well may have backed off on that remote start subscription. But the mere fact they were about to push it out means they would have done it had it not been for the huge public backlash. BMW did the same idiotic thing with making CarPlay a subscription based thing with their cars. They eventually pulled back from it and terminated the subscription system.

Per my other thread, I'm using a box that operates on Android but interfaces through CarPlay. Ever since getting this box, I haven't once ventured outside of it to do anything in the wretched Entune 3.0 Infotainment system.

 

[joeprocopio]

not like we're paying enough for the cars, and service (especially BMW service I'm sure)

 

[joeprocopio]

They very well may have backed off on that remote start subscription. But the mere fact they were about to push it out means they would have done it had it not been for the huge public backlash. BMW did the same idiotic thing with making CarPlay a subscription based thing with their cars. They eventually pulled back from it and terminated the subscription system.

Per my other thread, I'm using a box that operates on Android but interfaces through CarPlay. Ever since getting this box, I haven't once ventured outside of it to do anything in the wretched Entune 3.0 Infotainment system.

nice....

did you take a look at the TPMS link I shared from AliExpress? I wonder if 1) it's any good, and 2) if it is safe to install. having a brand new '21, I'm wary of installing anything to it right now that may void warranty etc.

 

[zx10guy]

nice....

did you take a look at the TPMS link I shared from AliExpress? I wonder if 1) it's any good, and 2) if it is safe to install. having a brand new '21, I'm wary of installing anything to it right now that may void warranty etc.

I took a look at the link. I don't see any major issues with it. With all the broken English, I think how the device works is by plugging into the OBD2 connector that you would connect a scan tool. It's pulling the TPMS information from the data bus going to the computer. So it's literally plug and play. If anyone needs to access the OBD2 connector, they would just unplug that TPMS display's connector.

Neat idea but not sure how useful it is given the location. I think it's going to be hard to read while you're driving or impossible to see while you're driving.

 

[mikesea]

on my 2021 xle, i thought it had a tire pressue display on dash, but wasnt able to find it yesterday when going thru the menu. does any one know if it displays tire pressure ? maybe just being lazy, but seems alot easier than going around all 4 tires with gauge lol

 

[joeprocopio]

No tire pressure display. If you pay for connected services the pressure and mileage and gas gauge will show up in the app.... Once your free year is up you don't get any of that in the app anymore