Metric tire size
205/50R17 tire size
A 205/50R17 tire is 25.1 inches (637 mm) tall and 8.1 in wide, for a 17-inch wheel, with a 4.0 in sidewall. That is the nominal size worked out from the code. Makers publish 24.9–25.4 in for real 205/50R17 tires (6 makers).
Compare 205/50R17 with other sizes
Set up for: comparing 205/50R17 with a size you're considering · Different situation?
Your current size
e.g. 265/70R17, 2657017 or 33x12.50R20
Where do I find my size?
It's on the tire sidewall, e.g. P265/70R17 115T, and on the tire placard sticker on the driver's door jamb (also in the owner's manual). The placard shows the size the vehicle came with; the sidewall shows what is fitted now. If they differ, use the placard as your starting point. Digits are enough here: 2657017 or 33125020.
Size you're considering
Real 205/50R17 tires: published diameters
Figures from the makers' own data books. They differ from the 25.1 in calculated figure because each tread design and construction measures slightly differently.
| Maker (data book) | Published diameter | Revs per mile | Approved wheel width | Listings |
|---|---|---|---|---|
| Falken | 25.1–25.4 in | 827–837 | 5.5–7.5 in | 3 |
| Goodyear | 25.1 in | 832–833 | 5.5–7.5 in | 2 |
| Hankook | 24.9–25 in | 828–834 | 5.5–7.5 in | 5 |
| Nitto | 25.16 in | — | 5.5–7.5 in | 1 |
| Toyo | 25.1 in | 827 | 5.5–7.5 in | 1 |
| Uniroyal | 25.1 in | 828 | 5.5–7.5 in | 1 |
Equivalent sizes on other wheels
Sizes that appear in the maker data books with a diameter within 3% of 205/50R17. Same diameter is only one part of fitting a different size.
| Wheel | Real sizes within 3% (closest first) |
|---|---|
| 15-inch | 215/60R15 , 195/65R15 , 265/50R15 |
| 16-inch | 195/60R16 , 205/55R16 , 225/50R16 |
| 17-inch | 255/40R17 , 225/45R17 , 235/45R17 |
| 18-inch | 225/40R18 , 255/35R18 , 295/30R18 |
| 20-inch | 225/30R20 , 275/25R20 , 235/30R20 |
Popular comparisons with 205/50R17
FAQ
How tall is a 205/50R17 tire?
25.1 inches (637 mm) calculated from the size code. Makers publish 24.9–25.4 in for real tires in this size; the difference comes from tread design and construction.
How do you work out the 205/50R17 diameter?
Sidewall = 205 mm × 50% = 102.5 mm. Diameter = 17 in wheel + 2 × 102.5 mm ÷ 25.4 = 25.07 in.
Is 205/50R17 a 25-inch tire?
It is about 25.1 in tall nominally, so it is close to 25 inches. Real tires in a size vary slightly by model; check the maker's spec sheet for the exact tire.
What sizes are equivalent to 205/50R17?
Real sizes within 3% of its diameter include 195/60R16 (+0.6%), 225/40R18 (+0.1%) and 225/30R20 (+1.0%). Equal diameter alone doesn't make a size suitable: wheel width, offset, clearance and load rating all matter.
How many revolutions per mile does a 205/50R17 make?
About 804 calculated from its unloaded diameter. Makers publish 827–837 revs per mile, measured under load (a loaded tire rolls on a slightly smaller radius), which is why published figures are higher.
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