Metric tire size
225/45R17 tire size
A 225/45R17 tire is 25.0 inches (634 mm) tall and 8.9 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 24.7–25.2 in for real 225/45R17 tires (6 makers).
Compare 225/45R17 with other sizes
Set up for: comparing 225/45R17 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 225/45R17 tires: published diameters
Figures from the makers' own data books. They differ from the 25.0 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 | 25–25.2 in | 822–834 | 7–8.5 in | 6 |
| Goodyear | 25 in | 836–837 | 7–8.5 in | 2 |
| Hankook | 24.7–25.2 in | 835–840 | 7–8.5 in | 8 |
| Nitto | 24.8–25.08 in | — | 7–8.5 in | 4 |
| Toyo | 25 in | 832 | 7–8.5 in | 1 |
| Uniroyal | 24.9 in | 833 | 7–8.5 in | 1 |
Equivalent sizes on other wheels
Sizes that appear in the maker data books with a diameter within 3% of 225/45R17. Same diameter is only one part of fitting a different size.
| Wheel | Real sizes within 3% (closest first) |
|---|---|
| 15-inch | 195/65R15 , 215/60R15 , 205/60R15 |
| 16-inch | 205/55R16 , 225/50R16 , 185/60R16 |
| 17-inch | 255/40R17 , 205/50R17 , 245/40R17 |
| 18-inch | 295/30R18 , 255/35R18 , 225/40R18 |
| 20-inch | 225/30R20 , 275/25R20 , 235/30R20 |
Popular comparisons with 225/45R17
FAQ
How tall is a 225/45R17 tire?
25.0 inches (634 mm) calculated from the size code. Makers publish 24.7–25.2 in for real tires in this size; the difference comes from tread design and construction.
How do you work out the 225/45R17 diameter?
Sidewall = 225 mm × 45% = 101.2 mm. Diameter = 17 in wheel + 2 × 101.2 mm ÷ 25.4 = 24.97 in.
Is 225/45R17 a 25-inch tire?
It is about 25.0 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 225/45R17?
Real sizes within 3% of its diameter include 205/55R16 (−0.4%), 295/30R18 (±0.0%) and 225/30R20 (+1.4%). 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 225/45R17 make?
About 808 calculated from its unloaded diameter. Makers publish 822–840 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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