21-inch rim — compatible tire sizes
What tires fit a 21-inch rim?
A 21-inch rim requires a tire with R21 in the size marking.
Size
Rim width (J)
| Rim width (J) | Recommended section width (mm) |
|---|---|
| 5J | 135–155 mm |
| 5.5J | 145–175 mm |
| 6J | 155–185 mm |
| 6.5J | 175–205 mm |
| 7J | 185–215 mm |
| 7.5J | 195–225 mm |
| 8J | 205–235 mm |
| 8.5J | 215–245 mm |
| 9J | 225–255 mm |
| 9.5J | 235–265 mm |
| 10J | 245–275 mm |
| 10.5J | 255–285 mm |
| 11J | 275–305 mm |
Seasonal check
Planning a long summer drive?
Use the budget and running-cost tools before a trip, especially if the current tires are worn or the replacement size changes diameter.
- Technical check
- 2026-06-28
- Content updated
- 2026-06-21
What changed
- Checked generated routes, metadata, sitemap inclusion and localized page rendering.