30 inch tire diameter cross-reference
Overall diameter
13 curated TireFitLab seed sizes round to about 30 inches overall diameter. Use the table to find similar-height sizes, then compare exact dimensions before fitting.
- 13 curated TireFitLab seed sizes round to about 30 inches overall diameter.
- Use the table to find similar-height sizes, then compare exact dimensions before fitting.
FAQ
- Overall diameter
- 13 curated TireFitLab seed sizes round to about 30 inches overall diameter. Use the table to find similar-height sizes, then compare exact dimensions before fitting.
- What should I verify before using this information?
- Use TireFitLab values as a sizing reference, then verify the vehicle handbook, tire placard, rim compatibility, load rating, and physical clearance before fitting.
| Candidate size | Overall diameter | Diameter difference | Section width | Rim | Compare |
|---|---|---|---|---|---|
| 245/70R16 | 29.50 in | -10.8 mm | 245 mm | 16 in | Open calculator |
| 235/70R17 | 29.95 in | +0.6 mm | 235 mm | 17 in | Open calculator |
| 245/65R17 | 29.54 in | -9.9 mm | 245 mm | 17 in | Open calculator |
| 255/65R17 | 30.05 in | +3.1 mm | 255 mm | 17 in | Open calculator |
| 235/65R18 | 30.03 in | +2.5 mm | 235 mm | 18 in | Open calculator |
| 245/60R18 | 29.57 in | -9.0 mm | 245 mm | 18 in | Open calculator |
| 255/50R20 | 30.04 in | +2.8 mm | 255 mm | 20 in | Open calculator |
| 265/50R20 | 30.43 in | +12.8 mm | 265 mm | 20 in | Open calculator |
| 275/45R20 | 29.74 in | -4.7 mm | 275 mm | 20 in | Open calculator |
| 305/40R20 | 29.61 in | -8.2 mm | 305 mm | 20 in | Open calculator |
| 265/45R21 | 30.39 in | +11.7 mm | 265 mm | 21 in | Open calculator |
| 265/40R22 | 30.35 in | +10.6 mm | 265 mm | 22 in | Open calculator |
| 285/35R22 | 29.85 in | -1.9 mm | 285 mm | 22 in | Open calculator |
Seed pages are limited to the public TireFitLab size corpus. The long tail stays gated until demand data supports expansion.
How to use diameter bands
Diameter-band pages group popular TireFitLab seed sizes by rounded overall diameter. The group is useful for finding similar-height candidates, but the exact calculator should still be used before any purchase or fitment decision.
Related references
Seasonal check
Planning a long summer drive?
Use the budget and running-cost tools before a trip, especially if the current tyres are worn or the replacement size changes diameter.
What changed
- Added curated overall-diameter cross-reference seed pages.