245/40R19 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: 245 mm
- Aspect ratio: 40 %
- Wheel diameter: 19.0 in
- Calculated nominal diameter: 678.6 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 |
|---|---|---|---|
| 2020 Acura RLX | Sport Hybrid SH-AWD | unspecified | Not documented |
| 2020 Acura RLX | Standard | unspecified | Not documented |
| 2014 Acura TL | SH-AWD | unspecified | Not documented |
| 2025 Cadillac CT5 | Selected 2025 models — 19-inch run-flat | front_rear | Not documented |
| 2025 Hyundai Sonata | N Line | front_rear | Not documented |
| 2024 Jaguar XF | R-Dynamic SE | unspecified | Not documented |
| 2025 Kia K5 | GT | unspecified | Not documented |
| 2020 Lincoln MKZ | Reserve 2.0T | unspecified | Not documented |
| 2020 Lincoln MKZ | Reserve 3.0T | unspecified | Not documented |
| 2020 Lincoln MKZ | Reserve Hybrid | unspecified | Not documented |
| 2020 Lincoln MKZ | Standard | unspecified | Not documented |
| 2023 Nissan Maxima | Platinum | unspecified | Not documented |
| 2023 Nissan Maxima | SR | unspecified | Not documented |
| 2011 Saab 9-5 | Aero | unspecified | Not documented |
Exact product variants in research
No source-backed rows are available for this exact selection.
Explore 245/40R19 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 245/40R19 tires on AmazonCompare sizes with the tire size calculator. It is an educational geometry comparison, not a fitment ruling.
Sources and scope
- Cadillac / GM News — 2025 Cadillac CT5 product specifications (checked 2026-11-01)
- Goodyear — 2025 Hyundai Sonata tire size by version (checked 2026-11-01)
- Goodyear — Find 2025 Kia K5 Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2014 Acura TL Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2020 Acura RLX Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2023 Nissan Maxima Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2020 Lincoln MKZ Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2024 Jaguar XF Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2011 Saab 9-5 Tires | Goodyear (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.