Tire Pressure recommendation (3 Viewers)

[gaijin]

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.

PLEASE CHECK THE SIDEWALL MARKINGS ON YOUR TIRES!

Michelin Defender LTX tires with the 116T Load Rating you say you purchased are NOT LT-Metric tires, they are P-Metric tires.

If your tires are indeed LT-Metric, the sidewalls of your tires should have imprinted on them: LT275/65R18 123/120R Load Range E. If they do, then the correct cold tire inflation pressure is 45psi.

If your tires are P-Metric, the sidewalls of your tires should have imprinted on them: 275/65R18 116T. If they do, then the correct cold tire inflation pressure is 33psi.

THIS IS VERY IMPORTANT!!!!!!! You must correctly identify whether you have LT-Metric or P-Metric tires on your vehicle - Michelin makes the Defender LTX M/S in BOTH types. I will also send you a PM directing ypou to this post to assure this is not overlooked.

Please post back what you find.

HTH

 

[stridertexas]

Well son of a........

Guess I’ll be calling Discount Tire on Tuesday to discuss this with them. The salesman said go LT, I agreed, and now I have different tires.

I’m glad I posted this and am now looking more closely at things. Inflating to 45psi would have been bad news bears!

 

[gaijin]

View attachment 1531039


Well son of a........

Guess I’ll be calling Discount Tire on Tuesday to discuss this with them. The salesman said go LT, I agreed, and now I have different tires.

I’m glad I posted this and am now looking more closely at things. Inflating to 45psi would have been bad news bears!

Yes, your tires are P-Metric and the Recommended Cold Tire Inflation Pressure for your tires is 33psi. Very glad we got that squared away.

 

[quehill]

Thanks Gaijin... you rock. How about for an LX570 running Continental Terraincontacts 275-55-r20.

Cheers!

 

[gaijin]

Thanks Gaijin... you rock. How about for an LX570 running Continental Terraincontacts 275-55-r20.

Cheers!

Do you mean the Continental TerrainContact A/T 275/55R20 113T? If so, then the Recommended Cold Tire Inflation Pressure for that P-Metric tire on an LX570 is 32psi F/R.

HTH

 

[RS6tofj80]

Gaijin -

what would you suggest for my new 37x11.5x20 Nitto Grapplers - 128Q ?

Thanks !!

 

[gaijin]

Gaijin -

what would you suggest for my new 37x11.5x20 Nitto Grapplers - 128Q ?

Thanks !!

The Recommended Cold Tire Inflation Pressure for the 37x11.50R20LT E 128Q Nitto Trail Grappler M/T tires on a LC200 is 33psi F/R.

HTH

 

[RS6tofj80]

ahhhh !! that explains why 38 seems a bit stiff...... many thanks, will try that and report back... Thanks !!

 

[JADANT]

Gaijin,

Want to confirm if 42psi is the correct pressure for 285 65 18 BFG TA KO2 on a 2017 Cruiser? As a newbie when is it advisable to air up beyond that, to say 50 psi?

Appreciate your insights.

Thank you,

Jadant

 

[gaijin]

Gaijin,

Want to confirm if 42psi is the correct pressure for 285 65 18 BFG TA KO2 on a 2017 Cruiser? As a newbie when is it advisable to air up beyond that, to say 50 psi?

Appreciate your insights.

Thank you,

Jadant

The Recommended Cold Tire Inflation Pressure for the BFG All Terrain T/A KO2 tires Part# 16168 LT285/65R18/E 125/122R on your LC200 is indeed 42psi F/R.

That 42psi is good all the way up to the GVWR of the vehicle and/or each GAWR individually. Some find it helps stability when towing a heavy trailer to increase the pressure for the rear tires, but 46psi would probably be enough - advice from others with such experience would be welcome.

HTH

 

[SWUtah]

285/55/20 BFG AT/KO2’s load range “D” is (40-42) PSI OK?

 

[gaijin]

285/55/20 BFG AT/KO2’s load range “D” is (40-42) PSI OK?

The recommended Cold Tire Inflation Pressure for the LT285/55R20 117/114T D BFG All-Terrain T/A KO2 tires on your 2015 LX570 is 43psi. Required Load Limit for these tires is 2,105 lbs. 42psi yields 2,100 lbs which is just shy of the requirement, so my safe recommendation is 43psi which yields 2,135 lbs.

HTH

 

[SWUtah]

The recommended Cold Tire Inflation Pressure for the LT285/55R20 117/114T D BFG All-Terrain T/A KO2 tires on your 2015 LX570 is 43psi. Required Load Limit for these tires is 2,105 lbs. 42psi yields 2,100 lbs which is just shy of the requirement, so my safe recommendation is 43psi which yields 2,135 lbs.

HTH

Since the tire pressure drops one pound for every 10° drop in temperature to be safe for the winter in North Florida should I just go in like 45 and then as it gets colder I don’t have to be concerned? Or am I being to anal

 

[FJ73Texas]

While most tires in the US carry either P or LT markings, some have neither. Euro Metric spec tires don't have the "P" or "LT" at all.

For example, one of the 16" tires for the 2017 Offroad Tacoma doesn't have the P or LT marking, it is an Goodyear tire manufactured in Canada and is shipped worldwide. European Metric tires normally have higher load carrying capacity than P-metric.

Example below.....
P-metric would be: P285/55/20
LT-metric would be: LT285/55/20
Euro Metric would be: 285/55/20

 

[gaijin]

Since the tire pressure drops one pound for every 10° drop in temperature to be safe for the winter in North Florida should I just go in like 45 and then as it gets colder I don’t have to be concerned? Or am I being to anal

Good question! Here's a page from Technical Service Bulletin T-SB-0345-08 issued by Toyota which addresses the question:

This TSB is aimed at tire pressure adjustment on customers' cars when the pressures are set in a heated workshop, but will be driven in colder temps. Good news is, it fits your question perfectly.

All you need to do when setting the Cold Tire Inflation Pressure of your tires is to note the difference between the ambient temp when you are filling your tires and calculate the difference between that temp and the coldest temp you anticipate experiencing during the winter and set you pressures higher accordingly.

For example, let's say you are setting the pressures in your tires to 43psi and the ambient temp is 80*F. You expect to be driving in colder temps over the next few months, let's say that the coldest temp you expect to experience is 44*F. The difference between the temp at which you set your pressure (80*F) and the coldest temp you expect (44*F) is 36*F. Look on the X-axis of the chart (marked "5") and find 36*F. Then follow that line up until it meets Line "1" and follow that over to the Y-axis where you will see approximately "3" psi. This means you should set tour Cold Tire Inflation Pressure to 43psi + 3psi = 46psi.

And you're worrying about being too anal ...

 

[SWUtah]

Perfect 46 it will be. Guess since the spare is going to be OEM 285 5020 I’ll have them pump it up to about 43 so my TPMS doesn’t go nuts.

 

[gaijin]

Perfect 46 it will be. Guess since the spare is going to be OEM 285 5020 I’ll have them pump it up to about 43 so my TPMS doesn’t go nuts.

After setting the pressures to whatever you want, you should reset the TPMS system. After reset, the system will register each tire pressure individually and alarm when any one of them goes 25% below the value when reset. All pressures do not have to be the same.

FYI

HTH

 

[BabaBear]

Hi. 2016 LC NOKIAN HAKKAPELIITTA R2 SUV 275 /65 R18 116R XL BSW?

 

[Markuson]

After setting the pressures to whatever you want, you should reset the TPMS system. After reset, the system will register each tire pressure individually and alarm when any one of them goes 25% below the value when reset. All pressures do not have to be the same.

FYI

HTH

Never heard that little tidbit on the reset function about individual settings...and the 25% warning trigger.
PSI Ninja strikes again!

 

[gaijin]

Hi. 2016 LC NOKIAN HAKKAPELIITTA R2 SUV 275 /65 R18 116R XL BSW?

The recommended Cold Tire Inflation Pressure for the Nokian Hakkapeliita R2 SUV 275/65R18 116 R tires on your 2016LC is 33psi.

HTH