LT285/75R18 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.
How to read this size
- Nominal width: 285 mm
- Aspect ratio: 75 %
- Wheel diameter: 18.0 in
- Calculated nominal diameter: 884.7 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
No source-backed rows are available for this exact selection.
Exact product variants in research
No source-backed rows are available for this exact selection.
Compare sizes with the tire size calculator. It is an educational geometry comparison, not a fitment ruling.
Sources and scope
- Tire Rack — Falken WildPeak A/T4W sizes and technical specification chart (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.