275/65R18 is a tire size notation. It describes geometry but does not establish the load, speed, tire class, wheel approval or fit of a particular replacement.
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How to read this size
- Nominal width: 275 mm
- Aspect ratio: 65 %
- Wheel diameter: 18.0 in
- Calculated nominal diameter: 814.7 mm
Calculated nominal diameter is an arithmetic estimate from the size code; actual product measurements vary.
Before ordering tires
Read the driver-door tire placard. Match the installed wheel, axle, tire class, load index, speed rating and any OE marking. The size alone cannot approve a replacement SKU. Tire-sidewall maximum pressure is not your vehicle’s cold inflation pressure.
Vehicles recorded with this size
| Model year and vehicle | Trim / option | Axle | Service |
|---|---|---|---|
| 2025 Chevrolet Colorado | Trail Boss | unspecified | Not documented |
| 2025 Chevrolet Silverado 1500 | Custom Trail Boss | unspecified | Not documented |
| 2025 Chevrolet Silverado 1500 | LT Trail Boss | unspecified | Not documented |
| 2025 Chevrolet Silverado 1500 | WT 4x4 Double/Crew Cab | unspecified | Not documented |
| 2025 Ford F-150 | Lariat Gas | unspecified | Not documented |
| 2025 Ford F-150 | Lariat Hybrid | unspecified | Not documented |
| 2025 Ford F-150 | STX 4-wheel drive | unspecified | Not documented |
| 2025 Ford F-150 | XLT 4-wheel drive | unspecified | Not documented |
| 2025 GMC Sierra 1500 | AT4 | unspecified | Not documented |
| 2025 GMC Sierra 1500 | Pro 4x4 with X31 Off-Road Package | unspecified | Not documented |
| 2025 Ram 1500 | Big Horn | front_rear | Not documented |
| 2025 Ram 1500 | Big Horn with Off-Road Group | front_rear | Not documented |
| 2025 Ram 1500 | Tradesman | front_rear | Not documented |
| 2025 Ram 1500 | Tradesman with Off-Road Group | front_rear | Not documented |
Exact product variants in research
| Tire line | Manufacturer part number | Service |
|---|---|---|
| Falken Wildpeak A/T4W | 28844901 | 116T |
Explore 275/65R18 tires on Amazon
Amazon search results may mix tire classes, load and speed ratings, OE markings and package quantities. Match the full requirement on your actual vehicle before ordering.
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Search 275/65R18 tires on AmazonCompare sizes with the tire size calculator. It is an educational geometry comparison, not a fitment ruling.
Sources and scope
- Goodyear — 2025 Ford F-150: version/option and tire size (checked 2026-11-01)
- Goodyear — 2025 Chevrolet Silverado 1500: version/option and tire size (checked 2026-11-01)
- Goodyear — 2025 GMC Sierra 1500: version/option and tire size (checked 2026-11-01)
- Goodyear US — Find 2025 Chevrolet Colorado Tires (checked 2026-11-01)
- Goodyear — 2025 Ram 1500 tire size by trim (checked 2026-11-01)
- Summit Racing (manufacturer part number visible) — Falken Wildpeak A/T4W Tire #28844901 (checked 2026-11-01)
Research checked November 2, 2026. A source-observed size is not final product fitment. Confirm the actual vehicle and current manufacturer guidance.