275/70R18 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.
As an Amazon Associate I earn from qualifying purchases.
How to read this size
- Nominal width: 275 mm
- Aspect ratio: 70 %
- Wheel diameter: 18.0 in
- Calculated nominal diameter: 842.2 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 Silverado 1500 | with ZR2 Suspension Package | unspecified | Not documented |
| 2026 Ford Expedition | Tremor | unspecified | Not documented |
| 2025 Ford F-150 | Tremor | unspecified | Not documented |
| 2025 GMC Sierra 1500 | AT4 | unspecified | Not documented |
| 2025 GMC Sierra 1500 | AT4X | unspecified | Not documented |
| 2025 GMC Sierra 1500 | AT4X AEV Edition | unspecified | Not documented |
| 2025 GMC Sierra 1500 | Pro 4x4 with X31 Off-Road Package | unspecified | Not documented |
| 2024 Nissan Titan | PRO-4X | unspecified | Not documented |
| 2025 Ram 1500 | Rebel | front_rear | Not documented |
| 2025 Ram 1500 | Warlock | front_rear | Not documented |
Exact product variants in research
No source-backed rows are available for this exact selection.
Explore 275/70R18 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.
(paid link)
Search 275/70R18 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 — 2025 Ram 1500 tire size by trim (checked 2026-11-01)
- Goodyear — Find 2024 Nissan Titan Tires | Goodyear (checked 2026-11-01)
- Ford Motor Company — 2026 Ford Expedition Technical Specifications (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.