What tire pressure should I run in Load Range E tires?

For daily, unloaded driving on a half-ton or three-quarter-ton truck, 40 to 50 PSI is usually comfortable and wears evenly. When hauling heavy loads or towing, you must increase the rear tires toward their 80 PSI maximum.

Is it OK to run 35 PSI in an E-rated tire?

Usually, no. E-rated tires have thick, stiff sidewalls that require more baseline air pressure than passenger tires. Running them at 35 PSI on a heavy truck can cause the tire to overheat, permanently damaging the sidewall.

What does 10-ply rated mean?

It is an older terminology equivalent to Load Range E. Modern consumer tires don't actually have 10 layers of cotton fabric anymore; they use fewer, stronger layers of steel and nylon, but offer the equivalent strength of a vintage 10-ply tire.

Should I inflate my trailer tires to the max PSI?

Yes. Unlike passenger vehicles, Special Trailer (ST) tires are designed to run at their maximum sidewall pressure (usually 50 PSI for Load Range C, or 65 PSI for D) at all times to reduce sidewall flex and heat buildup, which causes blowouts.

How do I know what load range my tires are?

Look at the tire sidewall near the tire size. You will see a letter designation (C, D, E) or the exact phrase "Load Range E" prominently stamped into the rubber.

Load Range Inflation Guide

Determine the correct tire pressure for your heavy-duty LT tires based on their specific Load Range and payload.

Quick Answer

A Load Range E (10-ply rated) light truck tire requires 80 PSI to achieve its absolute maximum load-carrying capacity. However, if you are driving empty, running 80 PSI will cause a harsh ride and severe center tread wear — you should lower the pressure to 45–50 PSI for daily unloaded driving.

Select your tire's load range marking to find the correct inflation pressure. Optionally enter your current PSI to see how much load capacity you're using.

Passenger / Euro-metric tires

Light Truck (LT) tires

All load ranges — reference table

Range	Ply equiv.	Max PSI	kPa	Bar
SLStandard Load	4	35	241	2.41
XLExtra Load	—	41	283	2.83
CLoad Range C	6	50	345	3.45
DLoad Range D	8	65	448	4.48
ELoad Range Emost common LT	10	80	552	5.52
FLoad Range F	12	95	655	6.55
GLoad Range G	14	110	758	7.58

Maximum Pressure Limits by LT Load Range

Load Range	Ply Rating Equivalent	Max Inflation (PSI)	Common Vehicle Use
Load Range C	6-Ply	50 PSI	Light SUVs / Jeeps
Load Range D	8-Ply	65 PSI	1/2 Ton Trucks / Vans
Load Range E	10-Ply	80 PSI	3/4 and 1 Ton Trucks
Load Range F	12-Ply	95 PSI	Commercial Trucks / RVs
Load Range G	14-Ply	110 PSI	Heavy Commercial

How Load Range Inflation Works

N/A — Standardized TRA (Tire and Rim Association) maximum pressure limits per load range

Load Range = corresponds to an older ply-rating system denoting casing strength and max pressure
Max PSI = structural ceiling; only inflate to max when carrying the tire's rated maximum load
Daily empty pressure = typically 15–25 PSI below max for ride quality and even wear
Trailer tires (ST) = exception: always inflate to max PSI to prevent dangerous sidewall flex

Frequently Asked Questions

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