30 inch tire diameter cross-reference
Overall diameter
13 curated TireFitLab sizes round to about 30 inches overall diameter. Use the table to find similar-height sizes, then compare exact dimensions 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 |
Reference 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
Winter tire rules coming up?
Check tread depth, markings and local winter requirements before the first cold spell instead of waiting for the appointment rush.