🚛🔗 Towing
Tire Size Calculator

Enter a tire size or select your HD truck to check towing-ready options. Match Load Index to GAWR/GVWR, choose LT (E/F) or ST for trailers, and set cold PSI using your vehicle placard and load-inflation tables. ST trailer tires typically require sidewall max cold PSI for rated load.

Calculate optimal tire sizes for towing with focus on load capacity, ply ratings, and trailer weight distribution for safe heavy-duty hauling.

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Load Range E
10-Ply
💪
Max Capacity
3,640 lbs/tire
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Max Pressure
80 PSI

Enter Tire Size

💡 Tip: Tire size format is Width/AspectRatio R WheelDiameter
Example: 235/45R18

Enter tire size to see visualization

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Towing-Specific Requirements

Towing requires Load Range E (10-ply) as a common minimum, pressure set by vehicle placard and load tables (typically up to 80 PSI when loaded), LT-rated tires recommended, matching load index to GVWR/GAWR, tire pressure monitoring, and regular rotation every 5,000 miles. Always follow manufacturer specifications.

🚛🔗 Towing Tire Essentials

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Load Range & Ply Rating

Load Range E = 10-ply rated (80 PSI max), carries 3,640 lbs per tire. Load Range F = 12-ply rated (95 PSI max), carries 3,970 lbs. For towing 10,000+ lbs, Load Range E is commonly recommended. For 15,000+ lbs or fifth-wheel, Load Range F is typically preferred. Always verify your GVWR and trailer weight—follow manufacturer specifications.

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Tire Pressure for Towing

Set cold PSI using your vehicle placard and load-inflation tables. Empty truck: typically 50-60 PSI. Towing 5,000 lbs: typically 65-70 PSI. Towing 10,000+ lbs: may approach 75-80 PSI (Load Range E max). ST trailer tires typically require their sidewall max cold PSI to achieve rated load. Always check pressure cold, before loading.

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LT vs P-Metric Tires

LT (Light Truck) tires have reinforced sidewalls, higher load capacity, and better puncture resistance. For heavy towing, LT tires (Load Range E/F) are commonly recommended over P-metric. LT tires have 3-ply sidewalls vs 2-ply for P-metric. Example: LT275/70R18 E carries 3,640 lbs vs P275/70R18 carries approximately 2,200 lbs. When using P-metric on trucks/SUVs, apply a 1.1 deration factor to load capacity.

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Trailer Tire Requirements

Trailer tires typically use ST (Special Trailer) designation: stiffer sidewalls and higher PSI ratings (50-80 PSI). ST tires are designed to prioritize stability over ride comfort. Match load rating to your axle weight. For tandem axles, both tires share the load. Typical replacement interval is 5-7 years regardless of tread depth—consult manufacturer guidance.

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Heat Management & Towing

Towing can generate 30-50% more heat than highway driving. Use tires with heat-resistant compounds (examples: Michelin Defender LTX M/S, Goodyear Wrangler DuraTrac). Check tire temps after 1 hour of towing—should be warm but not excessively hot to touch. Monitor for overheating (may indicate underinflation or overload). Reduce speed if tire temps approach 150°F.

Towing Setup & Pressure Tools

Optimize your towing configuration with these complementary calculators:

Tire Strategy for Towing

Standard to Load Range E

Essential upgrade for regular towing

Recommended Tire
Michelin Defender LTX M/S or Goodyear Wrangler DuraTrac
From: P275/65R18 (SL)
To: LT275/70R18 E
Benefits:
  • ✓3,640 lbs per tire capacity
  • ✓10-ply reinforced sidewalls
  • ✓80 PSI max pressure
  • ✓Safe for 10,000 lbs trailers
Trade-offs:
  • •Stiffer ride when empty
  • •10-15% heavier
  • •$250-350/tire

Load Range E to F

For heavy fifth-wheel & gooseneck

Recommended Tire
Toyo M144 or Firestone Transforce AT2
From: LT275/70R18 E
To: LT285/75R18 F
Benefits:
  • ✓3,970 lbs per tire capacity
  • ✓12-ply max strength
  • ✓Safe for 15,000+ lbs
  • ✓Commercial-grade durability
Trade-offs:
  • •Very stiff ride empty
  • •15-20% heavier
  • •$350-450/tire

Plus-Size for Stability

Wider footprint for sway control

Recommended Tire
BFGoodrich Commercial T/A Traction
From: LT275/70R18 E
To: LT295/70R18 E
Benefits:
  • ✓Better trailer sway control
  • ✓Improved braking
  • ✓More contact patch
Trade-offs:
  • •May need lift kit
  • •Reduced MPG
  • •Limited clearance

Top Towing Tire Brands

Michelin

Defender LTX M/S
$$$
Load Range E
•80,000 mile warranty
•MaxTouch construction
•Excellent towing stability
•Low rolling resistance
Available in LT275/70R18 E, LT285/70R17 E, LT265/70R17 E sizes

Goodyear

Wrangler DuraTrac RT
$$$
Load Range E
•Severe snow rated
•TractiveGroove tech
•Self-cleaning tread
•50,000 mile warranty
Available in LT275/70R18 E, LT285/70R17 E, LT305/70R16 E sizes

Toyo

M144 Commercial
$$$$
Load Range F
•12-ply rated
•4,080 lbs capacity
•Commercial truck grade
•Stone ejectors
Available in LT285/75R18 F, LT275/70R18 F sizes

Firestone

Transforce AT2
$$
Load Range E
•Budget-friendly
•UNI-T tech
•60,000 mile warranty
•Dual sidewall design
Available in LT275/70R18 E, LT265/70R17 E sizes

BFGoodrich

Commercial T/A Traction
$$$
Load Range E/F
•Severe service rated
•Durable casing
•Long tread life
•Retreadable
Available in LT275/70R18 E, LT285/75R18 F sizes

Official Towing Truck OEM Tire Specifications

ModelYearFrontRearLoad IndexPressure
Ford
F-350 Super Duty
2024LT275/70R18 ELT275/70R18 E125/122R80 PSI (max load)
Ram
3500 HD
2024LT285/70R17 ELT285/70R17 E121/118S80 PSI (max load)
Chevrolet
Silverado 3500 HD
2024LT265/70R17 ELT265/70R17 E121/118R80 PSI (max load)
🚛 Important: Match tire Load Index to your GAWR/GVWR and set cold PSI using the vehicle placard and load-inflation tables. ST trailer tires typically require their sidewall max cold PSI to achieve rated load. Check tire pressure cold, before loading.
📋 Data Disclaimer: Data illustrative; verify with OEM manuals and manufacturer specifications for exact tire sizes and pressure requirements. Specifications may vary by model year and market region.

Towing Tire FAQs

What load range do I need for towing?
Match tire Load Index and Range to your GAWR/GVWR and actual axle weights. Towing 5,000-8,000 lbs: Load Range D (8-ply) commonly used. Towing 8,000-12,000 lbs: Load Range E (10-ply) typically recommended. Towing 12,000-18,000 lbs: Load Range F (12-ply) is often preferred. Load Range E is most common for 3/4-ton and 1-ton trucks. Verify with your manufacturer specifications.
What tire pressure should I use when towing?
Set cold PSI using your vehicle placard and load-inflation tables for LT tires. ST trailer tires typically require their sidewall max cold PSI to achieve rated load. Empty truck: typically 50-60 PSI. Towing 5,000 lbs: typically 65-70 PSI. Towing 10,000+ lbs: may approach 75-80 PSI (Load Range E max). Always check pressure cold, before loading. Consult manufacturer data for your specific tire.
LT vs P-Metric for towing?
LT (Light Truck) tires have 3-ply sidewalls, higher load capacity, and reinforced construction, making them commonly recommended for heavy towing. P-metric tires used on trucks/SUVs must have their load capacity derated by a factor of 1.1. Example: LT275/70R18 E = 3,640 lbs capacity vs P275/70R18 ≈ 2,200 lbs. For heavy towing, LT tires (Load Range E/F) are typically preferred over P-metric. Follow manufacturer recommendations for your vehicle.
How often should I replace towing tires?
Replace based on tread depth and age. Tread: Replace at 4/32" (vs 2/32" for passenger tires). Age: Typically replace every 6-8 years regardless of tread. Towing generates significant heat and stress. Check for cracks, bulges, uneven wear patterns. Rotate every 5,000 miles for even wear. Consult tire manufacturer guidance for your specific tire.
Can I use highway tires for towing?
Highway tires can be suitable for towing if they are Load Range E/F rated. Examples like Michelin Defender LTX M/S and Bridgestone Duravis are highway tires designed for towing. Aggressive A/T tires may increase rolling resistance and reduce fuel economy by 10-15% when towing. Verify load capacity meets your vehicle's GVWR and towing needs.

Tire Size Comparison Tool

Compare two tire sizes to see the differences in dimensions and speedometer accuracy

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