Quick Example
Toyota's RAV4 owner's manuals list 225/65R17 (28.52" diameter), 225/60R18 (28.63") and 235/55R19 (29.18"). Going from the 17 inch size to the 18 inch size is a +0.4% diameter change, and to the 19 inch size +2.3%, both inside the common 3% guideline. Toyota says to use only the tire sizes it recommends, so check any other size with a Toyota dealer. Enter your model and a target size below for the exact number.
OEM diameter: 28.52"
Diameter: 29.10"
Diameter Difference
+2.06%
225/65R17 235/60R18 (+0.59")
Speedo Error
+2.06%
OEM Revs/Mile
707
New Revs/Mile
693
Common Guideline
±3%
Get a plain-English explanation of your results and what they mean for your vehicle.
Toyota Tire Guide
Own a Tacoma? See the dedicated Tacoma Tire Size Calculator for Tacoma factory sizes.
Toyota Factory Size Comparisons
| Model | OEM Size | Target Size | Diff % |
|---|---|---|---|
| Corolla (2024–2025) | 195/65R15 (24.98") | 205/55R16 (24.88") | -0.4% |
| Corolla (2024–2025) | 195/65R15 (24.98") | 225/40R18 (25.09") | +0.4% |
| Camry (2018–2024) | 215/55R17 (26.31") | 235/45R18 (26.33") | +0.1% |
| Camry (2018–2024) | 215/55R17 (26.31") | 235/40R19 (26.40") | +0.3% |
| RAV4 (2024–2025) | 225/65R17 (28.52") | 225/60R18 (28.63") | +0.4% |
| RAV4 (2024–2025) | 225/65R17 (28.52") | 235/55R19 (29.18") | +2.3% |
| 4Runner (2024) | 265/70R17 (31.61") | 245/60R20 (31.57") | -0.1% |
| 4Runner (2025) | 245/70R17 (30.50") | 245/70R18 (31.50") | +3.3% |
| Tundra (2025) | 245/75R18 (32.47") | 265/70R18 (32.61") | +0.4% |
Both sizes in each row are listed in Toyota owner's manuals. Diameters are calculated: Rim × 25.4 + 2 × (Width × Aspect ÷ 100). Always verify against your tire label.
How to Use This Calculator
- Select your Toyota model to load a factory tire size from Toyota's manuals.
- Enter the target tire size you're considering.
- Review the diameter difference, speedometer error and the size-change rating. The two sizes drawn to scale show the difference visually, and Toyota and Lexus manuals on spares are quoted in the spare tire chart.