Tire Pressure (passenger)

[fj5000]

Hi gang. Have moved into a new tire. Defender 275/65/18 (p-metric). Very happy.
Given the size difference from factory - how do I find the right (suggested) psi for this sized tire on this car?

called Michelin and they said they didn’t know - would have to check with manufacturer.
Any ideas? Running 38 now. Which is the same psi I was running when I had the e rated defenders on....

 

[NYC570]

Tire Pressure recommendation

forum.ih8mud.com

 

[gaijin]

Hi gang. Have moved into a new tire. Defender 275/65/18 (p-metric). Very happy.
Given the size difference from factory - how do I find the right (suggested) psi for this sized tire on this car?

called Michelin and they said they didn’t know - would have to check with manufacturer.
Any ideas? Running 38 now. Which is the same psi I was running when I had the e rated defenders on....

If you are asking about the Michelin Defender LTX M/S tires, then you need to double check the tire size. Michelin does not offer a P-Metric P275/65R18 size for that tire. You need to tell me whether you are asking about the ISO-Metric 275/65R18 SL 116T tire or the LT-Metric LT275/65R18/E 123/120R tire.

And please confirm that you are asking about use on a Land Cruiser 200, not an LX570.

Thanks

 

[gaijin]

Hi gang. Have moved into a new tire. Defender 275/65/18 (p-metric). Very happy.
Given the size difference from factory - how do I find the right (suggested) psi for this sized tire on this car?

called Michelin and they said they didn’t know - would have to check with manufacturer.
Any ideas? Running 38 now. Which is the same psi I was running when I had the e rated defenders on....

As I responded to your PM, and for the benefit of anyone else interested:

Just to be clear, you are asking about the ISO-Metric 275/65R18 SL 116T tire, right?

There are basically four kinds of tires and the RCTIP is calculated differently for each of them.

1. P-Metric tires for example P275/65R18. This would be the same as what you are calling a "passenger" tire.
2. ISO-Metric tires for example 275/65R18 SL 116T. For these tires it is important to know whether the tire is SL or XL and the Load Index.
3. LT-Metric tires for example LT275/65R18.
4. Flotation tires for example 33x11.50R18LT.

And, I'll assume you are using these on an LC200 and not an LX570, right?

If my assumptions are correct, then:

The RCTIP for those ISO-Metric 275/65R18 SL 116T tires on your LC200 is 33psi F/R.

HTH

 

[fj5000]

As I responded to your PM, and for the benefit of anyone else interested:

Just to be clear, you are asking about the ISO-Metric 275/65R18 SL 116T tire, right?

There are basically four kinds of tires and the RCTIP is calculated differently for each of them.

1. P-Metric tires for example P275/65R18. This would be the same as what you are calling a "passenger" tire.
2. ISO-Metric tires for example 275/65R18 SL 116T. For these tires it is important to know whether the tire is SL or XL and the Load Index.
3. LT-Metric tires for example LT275/65R18.
4. Flotation tires for example 33x11.50R18LT.

And, I'll assume you are using these on an LC200 and not an LX570, right?

If my assumptions are correct, then:

The RCTIP for those ISO-Metric 275/65R18 SL 116T tires on your LC200 is 33psi F/R.

HTH

Wonderful. Thank you!

 

[kty]

Wise @gaijin --

I'm in an LC 200 with the LTs of this tire -- Michelin Defender LT275/65R18 M/S

(Note they are NOT M/S2)

What is the preferred cold tire pressure, pls?

EDIT: NVM -- just found this post.

Thanks as always.

 

[gaijin]

Wise @gaijin --

I'm in an LC 200 with the LTs of this tire -- Michelin Defender LT275/65R18 M/S

(Note they are NOT M/S2)

What is the preferred cold tire pressure, pls?

The RCTIP (Recommended Cold* Tire Inflation Pressure) for LT275/65R18 tires on your LC200 is 45psi F/R

*According to Toyota:

Tire Pressure vs. Tire Temperature

Tire temperature is dependent on “cold” tire pressure, driving distance and speed, ambient temperature and road surface temperature. As the temperature of the tire changes, air in the tire expands and contracts, changing the tire’s air pressure. The cold tire pressure for all Toyota models will vary and will need to be adjusted accordingly.

“Cold” tire pressure, as shown on the tire pressure label on our vehicles, is generally considered to be the pressure in a tire that has not been driven in the past 4 hours and has been parked outdoors.

HTH