Tire Pressure recommendation (9 Viewers)

[gaijin]

Hi, gaijin.
Tried to find information in previous replies, but without result.
I'm wondering about RTCIP for my LC200 '08 tyres:
COMFORSER CF3000 285/70 R17 LT 121/118Q
NOKIAN HKPL LT3 285/70 R17 121/118Q
Thank you in advance.

The RCTIP for the Nokian LT3 LT285/70R17 121/118Q tires on your 2008 LC200 is 40psi F/R.

The RCTIP for the COMFORSER CF3000 285/70R17LT 121/118Q tires on your 2008 LC200 is 40psi F/R.

HTH

 

[TLCLVR]

The Recommended Cold Tire Inflation Pressure for ISO-Metric 285/60R18 116R XL tires on your 2013 LX570 is 34psi.

All my tire pressure recommendations are the same as the factory recommended pressure on the door placard - GVWR loads.

NOTE: The Nokian Hakkapelliitta R3 SUV 285/60R18 116R tire is NOT listed as XL-Rated on the Nokian site (Nokian Site), however, I have taken you at your word that your sidewall markings do indeed reflect an XL rating and I have recommended a pressure based on your description. Please be sure this is correct.

Yeah, says "Extra Load" on the sidewall. Too big to attach here, but there's a product guide on Nokian's website that lists it as XL.

Curious, is this the generic pressure recommendation from the ISO charts, or do you have access to Nokian's charts? Do the manufacturers always follow the ISO/P-metric/LT/Float charts to determine their load and pressure ratings? The reason I ask is that at this pressure, the tire appears rolled over the edges of the side blocks and the sides appear to be wearing faster. I know this is basic tire maintenance stuff and I can adjust, I just wanted a backup since the dealer hasn't been very helpful.

Thanks again!

 

[afgman786]

@gaijin is there a somewhat simple way of understanding the chart to determine tire pressure?
I've changed tires on my daily and got slightly larger tires for comfort, and was trying to figure out how to understand the chart

 

[gaijin]

@gaijin is there a somewhat simple way of understanding the chart to determine tire pressure?
I've changed tires on my daily and got slightly larger tires for comfort, and was trying to figure out how to understand the chart

Are you referring to the Load/Inflation charts published by TRA and included in the Toyo Tires monograph about exactly what you are asking? The Toyo Load Inflation tables and a complete explanation on how to use them is available here: Toyo Load Inflation Tables

After reading the explanation in the Toyo Tires publication, if you have any questions, just ask.

HTH

 

[Nickerfan88]

stock LC200 wildpeak at3w P285/70/r17 psi?

 

[Angelo1]

I could certainly use a recommendation for highway tire pressure for the 35/12.5r18 (no aftermarket bumpers)

 

[afgman786]

I could certainly use a recommendation for highway tire pressure for the 35/12.5r18 (no aftermarket bumpers)

You'll need to provide exact tire info along with if its LC or LX to get the info you're asking for

 

[Angelo1]

You'll need to provide exact tire info along with if its LC or LX to get the info you're asking for

On my new to me 2019 LC
35X12.50R18 BFGoodrich All-Terrain T/A KO2 has a diameter of 34.5", a width of 12.5", mounts on a 18" rim and has 602 revolutions per mile. It weighs 67.6 lbs, has a max load of 3415 lbs, a maximum air pressure of 65 psi, a tread depth of 15/32"

I will be replacing them with a KO2 305/65r18 eventually

 

[grinchy]

1. Load Index (will be on the tire as something like "116T" "114" etc.)
2. Standard or Reinforced Load Rating (will be on the tire as "SL" "XL" "Reinforced" etc.)
3. Max Load at Max Inflation Pressure (will be on tire as "Maximum 2750LBS @ 45PSI" or similar

Without further info, I cannot proceed.

 

[afgman786]

On my new to me 2019 LC
35X12.50R18/E 123R BFGoodrich All-Terrain T/A KO2

I will be replacing them with a KO2 LT305/65R18/E 124/121R eventually

FIFY
that is the info the master looks for to provide you the RCTIP

 

[Buildit]

LC200 Stock, Need PSI for LT275/70/18 BFG KO2

 

[JohnJB]

LC200 Stock, Need PSI for LT275/70/18 BFG KO2

From earlier in the thread:
The Recommended Cold Tire Inflation Pressure for LT275/70R18 KO2's on your LC200 is 41psi F/R

 

[gaijin]

stock LC200 wildpeak at3w P285/70/r17 psi?

The RCTIP for the Falken Wildpeak A/T3W P285/70R17 tire on your LC200 is 27psi F/R.

HTH

 

[gaijin]

On my new to me 2019 LC
35X12.50R18 BFGoodrich All-Terrain T/A KO2 has a diameter of 34.5", a width of 12.5", mounts on a 18" rim and has 602 revolutions per mile. It weighs 67.6 lbs, has a max load of 3415 lbs, a maximum air pressure of 65 psi, a tread depth of 15/32"

I will be replacing them with a KO2 305/65r18 eventually

The RCTIP for the 35x12.50R18/E 123R BFG All-Terrain T/A® KO2 tires on your LC200 is 35psi F/R.

HTH

 

[gaijin]

On my new to me 2019 LC
35X12.50R18 BFGoodrich All-Terrain T/A KO2 has a diameter of 34.5", a width of 12.5", mounts on a 18" rim and has 602 revolutions per mile. It weighs 67.6 lbs, has a max load of 3415 lbs, a maximum air pressure of 65 psi, a tread depth of 15/32"

I will be replacing them with a KO2 305/65r18 eventually

BFG does not make an ISO-Metric 305/65R18 tire, so I can't help you with that.

However, if you mean the LT305/65R18/E 124/121R BFG KO2, then the RCTIP for that tire on your LC200 will be 35psi F/R if and when you purchase those.

HTH

 

[Nickerfan88]

The RCTIP for the Falken Wildpeak A/T3W P285/70R17 tire on your LC200 is 27psi F/R.

HTH

Ummm wow. Seems low

 

[gaijin]

The RCTIP for the Falken Wildpeak A/T3W P285/70R17 tire on your LC200 is 27psi F/R.

HTH

Ummm wow. Seems low

Well... I find science trumps feelings every time.

On your LC200, the stock P285/60R18 tires at the factory RCTIP 33psi have a Load Limit of 2512 lbs.

On your LC200, the P285/70R17 Wildpeak A/T3W tires at my RCTIP 27psi have a Load Limit of 2527 lbs.

Seems perfect to me

HTH

 

[gaijin]

Ummm wow. Seems low

OK, "seems" like it's an opportune moment to highlight how important accurate descriptions of tire size/construction (P-Metric, ISO-Metric, LT-Metric) and application (i.e. LC200 or LX570) are to determining correct RCTIP (Recommended Cold Tire Inflation Pressure).

Let's focus on a common tire dimension and see how construction and application affect RCTIP:

P-Metric P285/70R17 - LC200 = 27psi / LX570 = 26psi
LT-Metric LT285/70R17 - LC200 = 40psi / LX570 = 35psi
ISO-Metric 285/70R17 117T SL - LC200 = 32psi / LX570 = 29psi

So... if the only info I get is something like, "what's the pressure for 285/70R17?" I really don't know what to suggest - could be anything from 26psi - 40psi.

If you want a RCTIP for a P-Metric tire, please include the "P" in the tire description.
If you want a RCTIP for a LT-Metric tire, please include the "LT" in the tire description.
If you want a RCTIP for an ISO-Metric tire, please include the Load Index (e.g. 117) and whether the tire is Standard Load (SL) or Extra Load (XL or Reinforced).

Also, it is important to know whether you are using the tires on a LC200 or LX570.

I don't mind helping out with RCTIP recommendations, but please, give me the info I need to get you the correct answer.

HTH

 

[catastrofe]

OK, "seems" like it's an opportune moment to highlight how important accurate descriptions of tire size/construction (P-Metric, ISO-Metric, LT-Metric) and application (i.e. LC200 or LX570) are to determining correct RCTIP (Recommended Cold Tire Inflation Pressure).

Let's focus on a common tire dimension and see how construction and application affect RCTIP:

P-Metric P285/70R17 - LC200 = 27psi / LX570 = 26psi
LT-Metric LT285/70R17 - LC200 = 40psi / LX570 = 35psi
ISO-Metric 285/70R17 117T SL - LC200 = 32psi / LX570 = 29psi

So... if the only info I get is something like, "what's the pressure for 285/70R17?" I really don't know what to suggest - could be anything from 26psi - 40psi.

If you want a RCTIP for a P-Metric tire, please include the "P" in the tire description.
If you want a RCTIP for a LT-Metric tire, please include the "LT" in the tire description.
If you want a RCTIP for an ISO-Metric tire, please include the Load Index (e.g. 117) and whether the tire is Standard Load (SL) or Extra Load (XL or Reinforced).

Also, it is important to know whether you are using the tires on a LC200 or LX570.

I don't mind helping out with RCTIP recommendations, but please, give me the info I need to get you the correct answer.

HTH

Have you ever thought of creating a chart of the most common LC and LX tire/wheel combos and posting it in your first post? It seems to me that you’ve already addressed most combinations somewhere in the thread.

 

[gaijin]

Have you ever thought of creating a chart of the most common LC and LX tire/wheel combos and posting it in your first post? It seems to me that you’ve already addressed most combinations somewhere in the thread.

No. There are too many to list. More importantly, I would rather answer a specific request which correctly specifies the requirement than risk someone who really doesn't know what they need incorrectly choosing a pressure from my post and winding up in an unsafe situation. The interaction with the person asking for the recommendation assures me they get the correct info.

I have published a link many times to a Toyo Tires monograph on this subject (Application of Load and Inflation Tables) which has all the info, guidance, explanations and required tables anyone should need to do the calcs for themselves, and they still get it wrong. So, I'd rather help a fellow forum member reach their "ah ha!" moment with a little guidance than worry that someone incorrectly interpreted a table I published.

Thanks for the suggestion, though.

HTH