Tire Size Calculator
Calculate tire specifications, compare different tire sizes, and find equivalent dimensions. Analyze speedometer error and get professional fitment recommendations.
Tire Size Calculator
Calculate tire specifications, compare sizes, and find equivalent tire dimensions
Tire Size Input
Understanding Tire Size Numbers
Reading Tire Size: 225/65R17
Additional Markings
Tire Size Conversion Guide
Plus Zero
Same wheel diameter, different tire width or aspect ratio. Minimal impact on overall diameter.
Plus One
Increase wheel size by 1 inch, decrease sidewall to maintain overall diameter.
Plus Two
Increase wheel size by 2 inches, significantly reduce sidewall height.
Tire Size Impact on Performance
| Change | Handling | Comfort | Fuel Economy | Cost |
|---|---|---|---|---|
| Wider Tire | Better grip | More noise | Higher consumption | More expensive |
| Lower Profile | Better response | Harsher ride | Minimal impact | Higher replacement cost |
| Larger Wheel | Improved handling | Less cushioning | Varies | Much higher cost |
Load Index Reference
Frequently Asked Questions
Can I use different size tires than what came on my car?
You can use different sizes as long as the overall diameter stays within 3% of the original. Always check your vehicle manual and consult with a tire professional.
What happens if my speedometer shows the wrong speed?
Speedometer error occurs when the tire diameter changes. A larger diameter makes your speedometer read slower than actual speed, while smaller diameter makes it read faster.
Should I upgrade to larger wheels?
Larger wheels can improve handling and appearance but reduce ride comfort and increase replacement costs. Consider your driving needs and budget.
How do I know if a tire will fit my car?
Check wheel well clearance, ensure proper load rating, verify speed rating meets your needs, and confirm the tire doesn't interfere with steering or suspension components.
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