2015 Ram 2500 Tire Size & Pressure Guide
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.
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Quick Answer
- OEM Tire Size: LT275/70R18E or LT285/60R20E
- Recommended Cold Tire Pressure (Door Placard):
- Front: 60-65 PSI
- Rear: 60-80 PSI (depending on load/trim)
- Bolt Pattern: 8x165.1mm (8x6.5 inches)
- Wheel Size: 18x8 inches or 20x8 inches
- Load Index/Speed Rating: 125/126R (LT275/70R18E) or 124/126R (LT285/60R20E)
- Spare Tire Size: Matches OEM tire size (full-size spare)
- TPMS Frequency: 433 MHz
Tire Sizes by Trim
| Trim | OEM Tire Size | OEM Wheel Size |
|---|---|---|
| Tradesman | LT275/70R18E | 18x8 |
| SLT | LT275/70R18E | 18x8 |
| Big Horn/Lone Star | LT275/70R18E | 18x8 |
| Laramie | LT285/60R20E | 20x8 |
| Laramie Longhorn | LT285/60R20E | 20x8 |
| Power Wagon | LT285/70R17D | 17x8 |
Recommended Replacement Tires
When it comes to replacing tires on your 2015 Ram 2500, especially with its heavy-duty capabilities, choosing the right tire is crucial for safety, performance, and longevity. Here are a few popular options across different price tiers:
-
BFGoodrich All-Terrain T/A KO2 (Premium): These are a perennial favorite for truck owners and for good reason. They offer excellent off-road traction, a robust sidewall for puncture resistance, and surprisingly good on-road manners. They are also known for their durability and long tread life. Expect to pay in the range of $250-$350+ per tire.
-
Michelin Defender LTX M/S (Premium): If your Ram 2500 spends most of its time on paved roads and you prioritize ride comfort, quietness, and exceptional wet/dry traction, the Defender LTX M/S is an outstanding choice. It boasts a long treadwear warranty and contributes to better fuel efficiency. These typically run $270-$370+ per tire.
-
Toyo Open Country A/T III (Mid-Range): A great all-around tire that balances off-road capability with on-road performance. The Open Country A/T III provides good traction in various conditions, a comfortable ride, and a reasonably long lifespan at a more accessible price point than some premium options. Prices typically range from $220-$300 per tire.
-
Falken Wildpeak A/T3W (Mid-Range): This tire has gained significant popularity for its aggressive looks and excellent performance in all weather conditions, including snow, thanks to its 3PMSF (three-peak mountain snowflake) rating. It
More specs for the 2015 Ram 2500
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
2015 Ram 2500 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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