What PSI do you run on your tires?
 

I will be getting new tires for my Jeep so I am wondering what PSI most people go for here without problems.

I run at 40PSI, but marked 41-45PSI, because I didn't want to be considered in the standard pressure group. Who knows, maybe I'll play with 41 to 43PSI.... maybe NOT with late fall & winter coming.....maybe...... ya know?

Don’t worry, you’re not...;)



:)

:turtle:


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Max sidewall. on my Avid Ascends, that's 51.

Doesn't that shake your dentures loose? :D:D
If'n ya go to New York City, potholes are attracted to high pressure tires.

Max sidewall 50 psi stone cold, they will be well into the 50s when warm.

I use 2.8-3.0 bar. What's that, 40-ish PSI?

Also, depending what tires i have at the moment. Some tires are soft&squishy even at 3.5bar, some are fine at 2.5bar

I cranked it up to max on my Prius shortly after I got it. Ran it like that for a few months but it seemed to cause the headlights to die young so I let them back down to about 40.

Then I replaced most of the lamps with LED and pushed the pressures back up to 51.

I don't know what the differences are between the truck's lamps and the Prius', it doesn't seem to affect them at all. It runs at 45. Any higher, though, and even I start to become unhappy with how the truck rides.

About 3 bar (we have metric air over here) that's a low 40's PSI.
More causes resonances and sounds which make long distance travel tiresome, and afaict hardly helps economy.

Seems like 40 is a good starting point, and a lot of you guys go a lot higher with no issues. Thanks :)

51 front, 47 rear on my Bridgestone Ecopias, which have a max sidewall of 44 PSI.... I voted 46-50. I don’t plan on going higher.
Edge wear still slightly outpacing the center wear. I corner hard.

I run max sidewall on the Volt but it's been so long since I've seen the car I can't remember what that psi is. I'm pretty sure they're Michelin ES though
The other day I couldn't even recall what the rims looked like and had to Google "2018 Volt" to remember

Did you really own a Volt or just a (bad?) dream? :)

It could be two or three more weeks to get it back. I guess it'll be like getting a new car at that point!

If my tires are below 40, it feels like I'm driving through soup. But yeah, if I run over a dime, I know it.

We used to run 45 psi in the rav4, but with the new "oversized" coopers the sweet spot seems to be around 36-38 psi. They have much stiffer sidewalls and are wider/taller, so they require less pressure to support the same weight. I could run them higher, but the ride would be horrible. It's already a stout ride. New hd coils in the rear and kyb shocks/struts all around. I love it. We have seen ~ 2mpg drop with the new tires, but they travel 6% more distance than the odometer reads, so it's all good. Currently averaging ~24 mpg since installing the new tires at 38 psi, compared to 26 mpg with the old ones at 45psi. The new tires are the very best we could find over the course of about 6 months of research. The rolling resistance on them seems to be about the same from 38-45 psi, so no need to make the ride harder with higher pressures. I have had tires that improved all the way to 60 psi, so these are definitely throwing me a curve ball with great performance at 38 psi. I run 80-100 psi in my truck when hauling, but that is only for carrying capacity/handling. The unloaded sweet spot is around 60/40.

My mom runs 50 PSI on her Prius. I ran 68 PSI in my Civic. Currently running 80 PSI in my Insight. Wouldn't recommend over 60 PSI unless you're an extremist.

From what I've read/experienced, tire wear seems to be best at sidewall max, and >70 PSI accelerates wear slightly on tires. Not all cars show a MPG improvement past 60 PSI, so unless yours does don't run them past 60 PSI.

This.

I tend to check them when my car is feeling wallowy and sluggish, and that’s typically just under 40. I pump them up to 48-50.

It seems that the consensus is that 40 PSI is a good minimum to start from. I am surprised to see an even distribution in the poll from 40 PSI.

I expect to see a really big mpg gain from these tires. I currently have 30 x 9.5 bf Goodrich tires at 35 PSI. I will be getting some A/S Michellin tires that are 235/75R15 and I will pump them up to 40 PSI. The nice thing about them is that they are more aerodynamic, 1/4 inch narrower and 29 inches tall :)

Here is an old 2008 thread started by CapriRacer about Hyper-inflated tires. The thread ran till 2016 & has lots of info relevant to this thread:
https://ecomodder.com/forum/showthre...ires-2582.html

That is a really good thread, thanks

Dodge Ram in sig

(How High?): According to the scaled load.

Each tire is at 1,985-lbs.
(7,940-lbs)
Tire maximum load is 3,000-lbs

The Load & Pressure Table (Michelin)
shows 45-psi meets equalization

Dodge wants not less than
50-psi

Maximum is 80-psi. That’s only seen when I hitch my 35’ travel trailer and am at that limit on the Drive Axle. The front moves to 55-psi.

— Overinflation ruins the ride
— Subjects the tire to more damage
— Worsens braking
— And, where FF/RR bias is ignored,
worsens handling.

My tire life average is well above 100k per set, to
the point that (2) sets covered the first
quarter-million miles.

The penalties offset the minor gains.

— Tire DESIGN is the critical factor. The right tire for intended use.

.

From seeing lots of medium duty trucks at my past tire shop jobs, I would say 50 PSI is perfectly reasonable in the rear. Many trucks wore out the center of the rear tires first, as i'm assuming they ran 80 PSI or close to it. Plus this is Georgia, where pickup trucks are used as fashion accessories more often than actual tools. Very little load most of the time.

The front tires on the other hand tended to wear the edges with 55 PSI specified, maybe 60 would be a more reasonable pressure? Of course, your truck, your experience. If you are getting even wear and 100K+ miles from each set of tires, I think whatever you are doing is working, and you should keep doing it! :thumbup:

Does driving through soup give it good flavor? Does adding a dime to the soup, really change the flavor? :D

Driving through soup leaves a bad taste in my mouth, and you'll never notice a dime under tires that are under 40 psi. :)

I'll have to inflate over 40PSI, so I can feel as one (dime?) with the road.

My new Ecopias spec a max of 44psi, so that's what I run. This is 3 bars on my gauge.

My Ecopias have a max sidewall of 44 PSI as well. Doesn't stop me from running 47 rear, 51 front!

This is the gauge i use when i check my tire pressure:


https://ecomodder.com/forum/attachme...1&d=1572989699

I'm sure there's a lot of cushion when manufacturers stipulate a sidewall PSI. In fact, the sidewall PSI spec is usually stated in terms that say or imply that the PSI level is what it takes in order to carry the maximum weight the tire can carry. So, it's not necessarily all the PSI the tire can take; it's just that it takes the specified PSI to handle the rated maximum weight.

As noted, my Ecopias specify 44 PSI too, so that's my target pressure.

My previous tires were Yokohamas which specified 51 PSI on the sidewalls. I usually ran at or about that level, but one of them developed a tread separation. I wondered if the 51 PSI was helpful or harmful in regards to the failure. I doubt that it was related to the failure, but there is no way to tell for sure.

A more likely factor causing the tread separation was the three "flats" and related repairs that poor tire had suffered through the years before it finally succumbed. Not helping was the fact that two of the flat-causing nails were within an inch of each other. Those malicious assaults on the tire were probably the real reason for the tread separation that killed my poor ole YOKO, and not the high 51 PSI.

The Avid Ascends I purchased for my Honda Accord have turned out to be a terrible buy. I will be lucky to get 40-50k out of them when they were rated for 80k.

That reminds me of my Goodyear Assurance Fuel Maxes. They were absolute heaven on my Subaru, so I got them for my wife's minivan when she needed tires next. Those wore out, but the ones on my Subaru were still going strong.

I have using 50 psi for 240k miles/ 7 yrs. on my 2013 CMAX Hybrid on Michelin Energy Saver tires getting 87k miles on them.

Paul

40 mostly, it's a good compromise for my clunker.

Running 42 psi on all four tyres. Vehicle is an estate car (Toyota Avensis), Quatrac 5 all season tyres 205/55 R16 tires. Toyota recommends 40 psi front and 42 psi rear for fully loaded and speeds above 100 mph. At least anything else for that car/ tyre/ load results in uneven tire wear. Try to find the right pressure for your tire and setup. There is not such a thing like "one solution" fits all when it comes to tire pressure. In case of doubt take your vehicle manufacturers recommendation - and if only a single pressure is stated just add 0.5 bar. Otherwise take the fully loaded pressure.

Wow, what tires are you running 80 psi on your Insight? My understanding is that burst pressure is about 4x sidewall max. I was running low 50's on my Gen2 Prius. Snapped a rear spring at one point. I don't know if there was a connection. Currently mellowed down to low/mid 40's on my Gen3.

+5 psi
 

I read the label on the door frame and add 5 or 6 more PSI.
We have so many potholes, running 44 PSI is too hard on old folks.
If we're going on a long road trip, I like to use 40ish PSI, for the MPGs.

Someone created a thread saying they did the math and they calculated that even though they would wear out their tires faster, the improved fuel economy would more than compensate.

Apparently it wasn't this thread: I did the math..

In that thread Dave Lobi said that he made an air dam and grill block from lawn edging and if it increased his fuel economy by 0.5 MPG it would pay for itself over 20,000 miles if it cost $20.

I do 44 front and 40psi rear on a lowered V6 Camry. At 44 in the rear it seems a bit bouncy and twitchy on corners. I also don’t carry a spare tyre - just a can of spray goo so the rear is a bit lighter too. I have a larger rear anti roll bar which makes the car corner very flat...

How the car rides is definitely impacted by tyre pressure but a full or empty gas tank is noticeable too.

I'm about to replace my FuelMax's with something else. They're dying from age rather than treadwear, but now that they're old there is approximately zero traction. They're great when new but terrible as they age.

51 psi, sidewall max.