215/50R17 Tire Size
215/50R17 diameter, sidewall, revolutions per mile, and plus-sizing options.
The 215/50R17 tire size breaks down as: 215 mm section width, 50% aspect ratio, and a 17-inch rim. Below are its real, calculated dimensions.
215/50R17 Calculated Dimensions
| Metric | Value |
|---|---|
| Overall diameter | 25.5 in (647 mm) |
| Sidewall height | 4.2 in (108 mm) |
| Circumference | 80.0 in (2032 mm) |
| Revolutions per mile | 792 |
Typical Fitment
215/50R17 is most often found on midsize sedans. Always confirm against the door-jamb placard or owner manual before fitting.
Plus-Sizing Alternatives
These sizes keep the overall diameter close to 215/50R17, so speedometer and gearing stay near stock:
| Size | Diameter | Diameter change |
|---|---|---|
| 225/50R17 | 25.86 in | +1.5% |
| 225/40R18 | 25.09 in | -1.5% |
| 235/35R19 | 25.48 in | +0.0% |
Speedometer Note
If you fit a 225/50R17 instead of 215/50R17, the diameter changes by +1.5%. A taller tire makes your speedometer read low — at a true 60 mph it would show roughly 59 mph. A shorter tire has the opposite effect, so the gauge reads high.
Use the tire calculator to compare 215/50R17 against any other size and see the exact diameter and speedometer difference.
Frequently Asked Questions
What does 215/50R17 mean?
215/50R17 means a 215 mm wide tire with a 50% sidewall aspect ratio mounted on a 17-inch rim. The aspect ratio is the sidewall height as a percentage of the width.
Can I plus-size from 215/50R17?
Yes, as long as the replacement keeps the overall diameter close to stock so the speedometer stays accurate. Common plus-size moves from 215/50R17 are 225/50R17, 225/40R18, 235/35R19.
Will 215/50R17 affect my speedometer?
Only if it differs in diameter from your original size. A taller tire reads low; a shorter tire reads high. Compare the two sizes with the calculator to find the percentage.