Tire pressure question for the experts

[ndmiller]

At 40PSI Load spec is 2675lbs, so you should be fine, it's a 115XL, 9 pounds heavier than stock.

Stock tire is 2760lbs @ 51PSI

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[kong]

At 40PSI Load spec is 2675lbs, so you should be fine, it's a 115XL, 9 pounds heavier than stock.

Stock tire is 2760lbs @ 51PSI

Appreciate your analysis, thank you. Just to clarify - are you saying I should be fine pumping the tires up to 48?

 

[DoubleTake]

I run my HTS60 275/60 at 50psi

And my snow claw LT 275/65 at 60psi

 

[LL75]

Appreciate your analysis, thank you. Just to clarify - are you saying I should be fine pumping the tires up to 48?

I think he meant run it at 40 psi and not 48

 

[ndmiller]

Appreciate your analysis, thank you. Just to clarify - are you saying I should be fine pumping the tires up to 48?

NOOOO. 40 cold will hold essentially the same load on these tires as 51 will hold on stock. I know a lot of the internet strives to break all boundaries but over 40 cold on these would be very bad.

I'd also recommend more regular checks of the pressure when the weather changes. 40 cold in the FL 90's would be 35ish when mornings are FL 70F amounting to a lower load holding capacity to these tires.

 

[kong]

NOOOO. 40 cold will hold essentially the same load on these tires as 51 will hold on stock. I know a lot of the internet strives to break all boundaries but over 40 cold on these would be very bad.

I'd also recommend more regular checks of the pressure when the weather changes. 40 cold in the FL 90's would be 35ish when mornings are FL 70F amounting to a lower load holding capacity to these tires.

Got it, thanks. So, I’m stuck with cranky TPMS warnings then?

 

[SANZC02]

Got it, thanks. So, I’m stuck with cranky TPMS warnings then?

I would be careful with any service or tire places adding air as well. Sometimes they rush and only check door jams for pressure and not max for tires for max values.

 

[kong]

The wife will not be impressed with TPMS warnings! I’ve cancelled the Atturo order and will be opting for the Continental TerrainContact ATs instead…

 

[riv-e-in]

Those look nice! I think the Defender is the best tire to get for handling/efficiency/treadwear, please report back once you have some data, here's detail on tire pressure, load, and the tread diameter in contact with the ground (contact patch) - 48 PSI is to maximize efficiency by minimizing the contact patch diameter:

Load (116)	PSI	8500	8250	8000	7750	7500	7250	7000
2755​	50​	6.5	6.4	6.3	6.2	6.1	6.0	5.9
2755​	48​	6.7	6.6	6.5	6.4	6.3	6.1	6.0
2755​	46​	6.8	6.7	6.6	6.5	6.4	6.3	6.2
2755​	44​	6.9	6.8	6.7	6.6	6.5	6.4	6.3
2755​	42​	7.1	7.0	6.9	6.8	6.7	6.6	6.5
2704​	41​	7.2	7.1	7.0	6.9	6.8	6.6	6.5
2652​	40​	7.3	7.2	7.1	7.0	6.8	6.7	6.6
2550​	38​	7.5	7.4	7.3	7.1	7.0	6.9	6.8

where did you find the pressure (psi) vs. weight (lb)? I’ve tried finding 116/116xl inflation charts and they all stop at 36psi or 42psi - https://www.civicx.com/forum/attachments/tire-load-index-table-pdf.235774/ or https://www.toyotires.com/tires-101/tire-load-and-inflation-tables

i‘m trying to correlate tire pressure between a 116xl rated tire (2756 lbs at 51 psi) and a 119 rated tire (3000 lbs at 80 psi). need to stop by the CAT scale tonight for a front & rear weight to find proper tire pressure based on weight (not the 48psi door jamb listing). Who knows, 48-50 psi might actually be a close psi for 119 tires on a r1s that will never tow??

Load	35 psi	40	45	50	55	60	65	70	75	80 psi
119	1765 lb	1865	2025	2205	2330	2475	2600	2755	2895	3000 lb
116xl	2150?	2325?	2525?	2755?	—-	—-	—-	—-	—-	—-

116xl values in the table were obtained from the first hyperlink for lt345/55r16 tires since the loads seemed similar.

 

[ksurfier]

where did you find the pressure (psi) vs. weight (lb)? I’ve tried finding 116/116xl inflation charts and they all stop at 36psi or 42psi - https://www.civicx.com/forum/attachments/tire-load-index-table-pdf.235774/ or https://www.toyotires.com/tires-101/tire-load-and-inflation-tables

i‘m trying to correlate tire pressure between a 116xl rated tire (2756 lbs at 51 psi) and a 119 rated tire (3000 lbs at 80 psi). need to stop by the CAT scale tonight for a front & rear weight to find proper tire pressure based on weight (not the 48psi door jamb listing). Who knows, 48-50 psi might actually be a close psi for 119 tires on a r1s that will never tow??

Load	35 psi	40	45	50	55	60	65	70	75	80 psi
119	1765 lb	1865	2025	2205	2330	2475	2600	2755	2895	3000 lb
116xl	2150?	2325?	2525?	2755?	—-	—-	—-	—-	—-	—-

116xl values in the table were obtained from the first hyperlink for lt345/55r16 tires since the loads seemed similar.

Try here:
https://www.toyotires.com/media/2125/application_of_load_inflation_tables_20170203.pdf

 

[riv-e-in]

2024 R1S dual motor with max battery on 275/50R22 ltx m/s2 tires & sport brights with running boards & cargo bars, three adults & one toddler, no cargo (front or rear)… on the CAT scale:

Front two wheels = 3640 lbs
Rear two wheels = 4120 lbs

looks like 45psi (4050 lbs) for the front tires and 50psi (4410 lbs) for the rear tires.
GVWR is 8562 lbs.

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