Tire Pressure recommendation (2 Viewers)

[BabaBear]

Hi,
I'm getting winter wheels/tires ready for my wife's 16 LC. Could you please let me know about the tire pressure for this setup?
Thanks.

Wheels:
Toyota TRD Pro 18's

Tires:
Nokian Hakkapeliitta R2 SUV
285 /60 R18 116R SL BSW

 

[gaijin]

Hi,
I'm getting winter wheels/tires ready for my wife's 16 LC. Could you please let me know about the tire pressure for this setup?
Thanks.

Wheels:
Toyota TRD Pro 18's

Tires:
Nokian Hakkapeliitta R2 SUV
285 /60 R18 116R SL BSW

The 2016 Land Cruiser comes standard with 285/60R18 tires.

As the sticker on your driver's side door jamb indicates, the recommended Cold Tire Inflation Pressure for the Nokian 285/60R18 116R tires is 33psi Front/Rear.

HTH

 

[GoISU]

Cooper ST Maxx 295/70/18 with an OME lift and ARB bumpers front and rear (not sure if that makes a difference).

Thanks in advance for running these for us!

 

[BabaBear]

The 2016 Land Cruiser comes standard with 285/60R18 tires.

As the sticker on your driver's side door jamb indicates, the recommended Cold Tire Inflation Pressure for the Nokian 285/60R18 116R tires is 33psi Front/Rear.

HTH

Thank you.

 

[gaijin]

Cooper ST Maxx 295/70/18 with an OME lift and ARB bumpers front and rear (not sure if that makes a difference).

Thanks in advance for running these for us!

The recommended Cold Tire Inflation Pressure for the Cooper Discoverer S/T MAXX LT295/70R18 129\126Q tires on your 2013 LC200 is 35psi Front/Rear.

HTH

 

[GoISU]

Thanks a lot! Time to let some air out...

 

[stiffarm]

Sure.

The recommended Cold Tire Inflation Pressure for the LT285/60R18 E 122/119S Nitto Terra Grappler G2 tires on your LC200 is 46psi Front/Rear.

The sidewall should say something like, "Maximum Load 3305/3000 Lbs @ 80psi." Sidewall should not say "Max Pressure 50" as you stated. Please check the tire size again and whether it is an LT-Metric tire.

The sticker on the door panel states the correct pressure for the tire size stated on the door panel - P285/60R18 which is a P-Metric tire.

HTH

Thanks but the dealer installed the non-LT Grapplers--285/60-18 120s XL (extra load--whatever that means. Max pressure is 50lbs and max load 3086--apparently a 6 ply tire and not the 10 ply E rated LT285/60-18

No wonder the price was good...so, should I run less than 46 psi?

Thanks

 

[gaijin]

Thanks but the dealer installed the non-LT Grapplers--285/60-18 120s XL (extra load--whatever that means. Max pressure is 50lbs and max load 3086--apparently a 6 ply tire and not the 10 ply E rated LT285/60-18

No wonder the price was good...so, should I run less than 46 psi?

Thanks

Yes! You should run less than 46psi.

The recommended Cold Tire Inflation Pressure for the Non-LT Grapplers is the same pressure as is stated on the sticker on your door jamb - 33psi Front/Rear.

HTH

 

[Lexus68]

Thanks in advance. Hankook Dynapro AT-M in P275/60R20 114T for LX570.

 

[gaijin]

Thanks in advance. Hankook Dynapro AT-M in P275/60R20 114T for LX570.

Looks like 28psi F/R in the P275/60R20 tires will achieve a slightly higher Load Limit than the OEM P285/50R20 tires @33psi.

After my first cup of coffee this morning, the better response is:

The recommended Cold Tire Inflation Pressure for the P275/60R20 tires on your LX570 is 28psi F/R.

HTH

 

[SchobTime]

You rock! How about ProComp MT2s 295/65/18? thanks much - truly appreciated!

 

[Island1064]

Gaijin, one thing I can't really wrap my head around with those tire pressure is:
How come a metric tire that seems lighter in construction needs less psi than a seemingly beefier, stronger and heavier lt tire?
Logically in my feeble mind it should be the other way around, but I am not an engineer even though I slept in a Holliday inn once.

 

[jmw101]

Gaijin -- You are the master. Thanks for always answering these threads and providing insight.

 

[SWUtah]

Gaijin, one thing I can't really wrap my head around with those tire pressure is:
How come a metric tire that seems lighter in construction needs less psi than a seemingly beefier, stronger and heavier lt tire?
Logically in my feeble mind it should be the other way around, but I am not an engineer even though I slept in a Holliday inn once.

I think it's the same principle that it takes less pressure to blowup a balloon then a heavyweight rubber water bottle?

 

[stridertexas]

Sure. The recommended Cold Tire Inflation Pressure for the LT275/65R18's on your LC200 is 45psi Front/Rear.

HTH

I just put these tires on this weekend and drove away at 39-40 psi from Discount Tire. Felt like there was a lot of vibration in the steering wheel until I took them down to 34.

The door sticker says 33. Could you direct me to more on these higher pressures? I’m intrigued now : )

 

[gaijin]

You rock! How about ProComp MT2s 295/65/18? thanks much - truly appreciated!

The Recommended Cold Tire Inflation Pressure for the Pro Comp Xtreme MT2 tires LT295/65R18 on your LC200 is 39psi F/R.

HTH

P.S. Sorry for the late reply - somehow I missed your post ...

 

[gaijin]

I just put these tires on this weekend and drove away at 39-40 psi from Discount Tire. Felt like there was a lot of vibration in the steering wheel until I took them down to 34.

The door sticker says 33. Could you direct me to more on these higher pressures? I’m intrigued now : )

Your asking about LT275/65R18 tires on a 200 series Land Cruiser, right?

Your door sticker recommends 33psi F/R for the OEM P-Metric tires P285/60R18 - a very different tire, size and type, than the LT-Metric LT275/65R18 under discussion.

First a word of caution: The lowest pressure recommended for the LT275/65R18 tires on ANY vehicle is 35psi. The Recommended Cold Tire Inflation Pressure for these tires on a 200 series Land Cruiser is 45psi. ANYTHING LESS THAN 45psi is underinflated and can lead to tire failure (what we engineers like to call "uncontrolled spontaneous decompression."

The rationale behind the higher pressure for the LT275/65R18 tires is simple - Load Limit.

The OEM P285/60R18 tires at the factory recommended inflation pressure of 33psi have a Load Limit of 2,512 pounds. Since these are a P-Metric tire used on a Light Truck, the Load Limit has been inflated by 10% (industry convention) - the "raw" required Load Limit is, therefore, 2,512/1.1 = 2,286 pounds.

At 45psi, the LT275/65R18 tires have a Load Limit of 2,310 pounds. This Load Limit does not need to be adjusted as it is a Light Truck tire used on a Light Truck. Yes, the 2,310 pound Load Limit at 45psi is slightly above the minimum required 2,286 pounds, but 45psi is the nearest whole psi number that meets or exceeds the minumum required.

Just to drive home my cautionary point - at 35psi, the LT275/65R18 tires have a Load Limit of only 1,940 pounds which is 346 pounds BELOW the required minumum Load Limit.

Clear as mud, right?

HTH

 

[gaijin]

Gaijin, one thing I can't really wrap my head around with those tire pressure is:
How come a metric tire that seems lighter in construction needs less psi than a seemingly beefier, stronger and heavier lt tire?
Logically in my feeble mind it should be the other way around, but I am not an engineer even though I slept in a Holliday inn once.

Unfortunately, there is no simple answer. P-Metric and LT-Metric tires are all manufactured to industry specifications which dictate performance characteristics and how they are tested. Luckily, all tires of the same size and type, e.g. LT285/70R17, are manufactured to the same specifications and subject to the same test procedures. This allows us to be able to evaluate suitability (and manufacturers to be able to recommend tires) based solely on size and type. Imagine what a nightmare it would be if BFG manufactured and tested to different specs than Toyo, or Cooper, or Pro Comp, or Michelin, etc.

However, P-Metric tires and LT-Metric tires are manufactured and tested to different sets of specifications. To be able to understand how performance characteristics compare from one type to the other, one must compare the industry standards for both types - in a nutshell, that is what I do when making my recommendations.

Sometimes you just have to trust the science.

Does that make sense?

HTH

 

[gaijin]

Gaijin -- You are the master. Thanks for always answering these threads and providing insight.

Thanks! Always like to be appreciated

 

[stridertexas]

Your asking about LT275/65R18 tires on a 200 series Land Cruiser, right?

Correct, I just purchased a set of 275/65/R18 Michelin Defender LTX M/S 116T SL. The guy at Discount said to not go P-metric and go to LT. So I did.

I guess I never really considered the PSI needing to change based on the type of tire...So when I read before that you mentioned it’d be at 45PSI I was confused and shocked over the “increase from stock psi”. But this makes sense.

I’ll be increasing to 45 PSI once all the neighbors wake up on this Labor Day, and I can turn on my compressor : )

Happy Labor Day everyone! BTW.