235/50R21 tire size
A 235/50R21 tire is 30.25 inches (768.4 mm) tall, 9.25 in (235 mm) wide and fits a 21-inch wheel. In inch notation it is roughly a 30.3x9.3R21 — a "30-inch" tire.
| Overall diameter | 30.25 in | 768.4 mm |
|---|---|---|
| Section width | 9.25 in | 235 mm |
| Sidewall height | 4.63 in | 117.5 mm |
| Circumference | 95.04 in | 2,414 mm |
| Revolutions | 666.7 per mile | 414.3 per km |
| Rim diameter | 21 in | 533.4 mm |
Compare 235/50R21 with another size
Alternative sizes on the same 21-inch wheel
Sizes in use within ±3 % of the overall diameter of 235/50R21:
Plus and minus sizes for 235/50R21
| Size | Wheel | Diameter | Difference |
|---|---|---|---|
| 235/60R19 | Minus 2 (19 in) | 30.10 in | −0.49% |
| 255/55R19 | Minus 2 (19 in) | 30.04 in | −0.69% |
| 265/55R19 | Minus 2 (19 in) | 30.48 in | +0.74% |
| 275/50R19 | Minus 2 (19 in) | 29.83 in | −1.41% |
| 235/55R20 | Minus 1 (20 in) | 30.18 in | −0.25% |
| 285/45R20 | Minus 1 (20 in) | 30.10 in | −0.51% |
| 265/50R20 | Minus 1 (20 in) | 30.43 in | +0.60% |
| 255/50R20 | Minus 1 (20 in) | 30.04 in | −0.70% |
| 265/40R22 | Plus 1 (22 in) | 30.35 in | +0.31% |
| 255/40R22 | Plus 1 (22 in) | 30.03 in | −0.73% |
| 285/35R22 | Plus 1 (22 in) | 29.85 in | −1.31% |
| 275/40R22 | Plus 1 (22 in) | 30.66 in | +1.35% |
| 275/35R23 | Plus 2 (23 in) | 30.58 in | +1.08% |
| 285/35R23 | Plus 2 (23 in) | 30.85 in | +1.99% |
| 255/40R23 | Plus 2 (23 in) | 31.03 in | +2.58% |
Nearby 21-inch sizes
Reading the 235/50R21 size
- 235 — section width in millimetres (9.25 in).
- 50 — aspect ratio: the sidewall is 50 % of the width, 117.5 mm.
- R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
- 21 — fits a 21-inch diameter wheel.
The load index and speed rating (for example 91V) follow the size on the sidewall. They must meet at least the values on your vehicle's tire placard.