2018 International LT — Tire Size & Pressure
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
Working on this 2018 International LT? Run just this one job through Repairius.
No big switch. Write the estimate, text it for approval, and get paid on your phone. Keep everything else the way it is.
14-day free trial · credit card required · cancel anytime
Quick answer
- OEM Tire Size: 11R22.5 (many configurations possible)
- Recommended Cold Tire Pressure (Door Placard): Varies significantly by configuration and load, refer to your specific truck's door placard. Typically ranges from 95-110 psi for highway applications.
- Bolt Pattern: 10-hole, 285.75mm bolt circle diameter (Budd or Stud-piloted/Hub-piloted depending on spec)
- Wheel Size: 22.5 x 8.25 inches (standard), 22.5 x 9.00 inches (wider options available)
- Load Index/Speed Rating: Varies greatly; typically J (62 mph) or K (68 mph) speed rating for line haul, with load indexes corresponding to single and dual tire applications (e.g., 146/143 for 7,830 lbs single/7,160 lbs dual load capacity).
- Spare Tire Size: Often the same as the drive or steer tires, 11R22.5.
- TPMS Frequency: 315 MHz or 433 MHz, depending on the specific TPMS system installed. Consult your owner's manual.
Tire sizes by trim
The 2018 International LT Series is a highly customizable heavy-duty truck, and as such, there isn't a simple "trim" based tire size chart like you'd find on a passenger vehicle. Tire sizes are specified based on the truck's intended application, gross vehicle weight rating (GVWR), axle ratings, and customer preference. The most common tire size for line-haul applications is 11R22.5.
Here's a breakdown of common configurations:
| Axle Position | Common Tire Sizes | Notes |
|---|---|---|
| Steer Axle | 11R22.5, 295/75R22.5 | Optimized for steering response and load carrying. |
| Drive Axle | 11R22.5, 295/75R22.5 | Designed for traction and heavy loads. |
| Trailer Axle | 11R22.5, 295/75R22.5 | Often matched to drive axle tires for inventory consistency. |
Other less common sizes, including low-profile options like 275/80R22.5 or wider flotation tires for specific applications, may also be spec'd.
Recommended replacement tires
HGVs like the International LT require application-specific tires for optimal performance, fuel economy, and safety. Here are some popular options across different price tiers:
- Michelin X Line Energy Z (Steer) / D (Drive): (Premium) - Engineered for long-haul fuel efficiency. Expect excellent tread life and low rolling resistance. Price: $$$$
- Goodyear Fuel Max S (Steer) / D (Drive): (Premium) - A strong competitor to Michelin, offering similar fuel economy benefits and durability. Price: $$$$
- Bridgestone R283A Ecopia (Steer) / M760 Ecopia (Drive): (Premium) - Focuses on emissions reduction and fuel efficiency, with good traction in various conditions. Price: $$$$
- Continental Hybrid HS3 (Steer) / HD3 (Drive): (Mid-Range/Premium) - Offers a balance of fuel efficiency, mileage, and all-weather traction. Price: $$$
- Hankook AH35 (Steer) / DH07 (Drive): (Value/Mid-Range) - A popular choice for regional and long-haul applications, providing good mileage and reliability at a more accessible price point. Price: $$
When to inflate to max load psi
For heavy-duty trucks like the 2018 International LT, "max load psi" (maximum cold inflation pressure listed on the tire's sidewall) is critical for safety and tire longevity when carrying heavy loads. You should inflate your tires to the maximum load psi recommended by the tire manufacturer when your truck is operating at or near its maximum gross vehicle weight rating (GVWR) or individual axle weight ratings.
However, it
More specs for the 2018 International LT
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2018 International LT Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
Browse by make
Running an auto or diesel repair shop?
Compare Repairius to the shop software you're paying for
$99.99/month (first location included), unlimited users, 14-day free trial.