Metric tire size
205/50R15 tire size
A 205/50R15 tire is 23.1 inches (586 mm) tall and 8.1 in wide, for a 15-inch wheel, with a 4.0 in sidewall. That is the nominal size worked out from the code. Makers publish 22.95–23.11 in for real 205/50R15 tires (5 makers).
Compare 205/50R15 with other sizes
Set up for: comparing 205/50R15 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 205/50R15 tires: published diameters
Figures from the makers' own data books. They differ from the 23.1 in calculated figure because each tread design and construction measures slightly differently.
| Maker (data book) | Published diameter | Revs per mile | Approved wheel width | Listings |
|---|---|---|---|---|
| BFGoodrich | 23.1 in | 900 | 5.5–7.5 in | 1 |
| Falken | 23.1 in | 910 | 5.5–7.5 in | 1 |
| Goodyear | 23.1 in | 904 | 5.5–7.5 in | 1 |
| Nitto | 22.95–23.11 in | — | 5.5–7.5 in | 3 |
| Toyo | 23–23.1 in | 899–903 | 5.5–7.5 in | 3 |
Equivalent sizes on other wheels
Sizes that appear in the maker data books with a diameter within 3% of 205/50R15. Same diameter is only one part of fitting a different size.
| Wheel | Real sizes within 3% (closest first) |
|---|---|
| 15-inch | 185/55R15 , 225/45R15 , 245/40R15 |
| 16-inch | 195/45R16 , 205/45R16 , 185/50R16 |
| 17-inch | 215/35R17 , 205/40R17 , 245/35R17 |
| 18-inch | 235/30R18 , 205/35R18 |
Popular comparisons with 205/50R15
FAQ
How tall is a 205/50R15 tire?
23.1 inches (586 mm) calculated from the size code. Makers publish 22.95–23.11 in for real tires in this size; the difference comes from tread design and construction.
How do you work out the 205/50R15 diameter?
Sidewall = 205 mm × 50% = 102.5 mm. Diameter = 15 in wheel + 2 × 102.5 mm ÷ 25.4 = 23.07 in.
Is 205/50R15 a 23-inch tire?
It is about 23.1 in tall nominally, so it is close to 23 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 205/50R15?
Real sizes within 3% of its diameter include 195/45R16 (−0.7%), 215/35R17 (−0.6%) and 235/30R18 (+2.1%). 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 205/50R15 make?
About 874 calculated from its unloaded diameter. Makers publish 899–910 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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