255/45R20 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: 255 mm
- Aspect ratio: 45 %
- Wheel diameter: 20.0 in
- Calculated nominal diameter: 737.5 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 Acura RDX | A-Spec | front_rear | Not documented |
| 2025 Acura RDX | A-Spec Advance | front_rear | Not documented |
| 2025 Alfa Romeo Stelvio | Intensa | unspecified | Not documented |
| 2025 Alfa Romeo Stelvio | Standard | unspecified | Not documented |
| 2025 Audi Q5 | All-New Premium Plus | front_rear | Not documented |
| 2025 Audi Q5 | All-New Prestige | front_rear | Not documented |
| 2025 Audi Q5 | Premium 45 TFSI Convenience Plus | front_rear | Not documented |
| 2025 Audi Q5 | Premium Plus 45 TFSI | front_rear | Not documented |
| 2025 Audi Q5 | Premium Plus 45 TFSI Black Optic | front_rear | Not documented |
| 2025 Audi Q5 | Prestige 45 TFSI | front_rear | Not documented |
| 2025 Genesis GV60 | Advanced All-wheel drive | unspecified | Not documented |
| 2025 Hyundai IONIQ 5 | Limited AWD | front_rear | Not documented |
| 2025 Hyundai Santa Fe | Hybrid Calligraphy | unspecified | Not documented |
| 2025 Hyundai Santa Fe | Hybrid Limited | unspecified | Not documented |
| 2025 Hyundai Santa Fe | Limited | unspecified | Not documented |
| 2025 Infiniti QX50 | Sport | unspecified | Not documented |
| 2025 Infiniti QX55 | Essential | unspecified | Not documented |
| 2025 Infiniti QX55 | Luxe | unspecified | Not documented |
| 2025 Infiniti QX55 | Sensory | unspecified | Not documented |
| 2026 Kia EV6 | GT-Line AWD | front_rear | Not documented |
| 2025 Kia Sorento | EX | front_rear | Not documented |
| 2025 Kia Sorento | SX | front_rear | Not documented |
| 2025 Kia Sorento | X-Line EX | front_rear | Not documented |
| 2025 Kia Sorento | X-Line SX | front_rear | Not documented |
| 2025 Kia Sorento | X-Line SX Prestige | front_rear | Not documented |
| 2025 Mercedes-Benz GLC-Class | AMG GLC Coupe | front | Not documented |
| 2025 Mitsubishi Outlander | Platinum Edition | front_rear | Not documented |
| 2025 Mitsubishi Outlander | SE | front_rear | Not documented |
| 2025 Mitsubishi Outlander | SEL | front_rear | Not documented |
| 2025 Nissan Ariya | Platinum+ | unspecified | Not documented |
| 2025 Volkswagen ID.4 | Pro AWD | rear | Not documented |
| 2025 Volkswagen ID.4 | Pro S AWD | rear | Not documented |
| 2025 Volkswagen ID.4 | Pro S RWD | rear | Not documented |
Exact product variants in research
No source-backed rows are available for this exact selection.
Explore 255/45R20 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 255/45R20 tires on AmazonCompare sizes with the tire size calculator. It is an educational geometry comparison, not a fitment ruling.
Sources and scope
- American Honda / Acura — 2025 Acura RDX Specs & Features (checked 2026-11-01)
- Goodyear US — Find 2025 Hyundai Santa-Fe Tires (checked 2026-11-01)
- Goodyear — 2025 Volkswagen ID.4 tire size by trim (checked 2026-11-01)
- Goodyear — 2025 Mitsubishi Outlander tire size by trim (checked 2026-11-01)
- Goodyear — 2025 Kia Sorento tire size by trim (checked 2026-11-01)
- Goodyear — 2025 Audi Q5 tire size by trim (checked 2026-11-01)
- Goodyear — 2025 Audi Q5 (All-New) tire sizes (checked 2026-11-01)
- Goodyear — 2025 Mercedes-Benz GLC-Class tire sizes (checked 2026-11-01)
- Goodyear — 2025 Hyundai Ioniq 5 tire size by version (checked 2026-11-01)
- Kia America — 2026 Kia EV6 Specifications (checked 2026-11-01)
- Goodyear — Find 2025 Nissan Ariya Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2025 Genesis GV60 Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2025 Infiniti QX50 Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2025 Infiniti QX55 Tires | Goodyear (checked 2026-11-01)
- Goodyear — Find 2025 Alfa Romeo Stelvio 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.