Metric tire size
225/40R19 tire size
A 225/40R19 tire is 26.1 inches (663 mm) tall and 8.9 in wide, for a 19-inch wheel, with a 3.5 in sidewall. That is the nominal size worked out from the code. Makers publish 25.8–26.3 in for real 225/40R19 tires (6 makers).
Compare 225/40R19 with other sizes
Set up for: comparing 225/40R19 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 225/40R19 tires: published diameters
Figures from the makers' own data books. They differ from the 26.1 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 | 26.1–26.3 in | 788–794 | 7.5–9 in | 3 |
| Goodyear | 26.1 in | 801 | 7.5–9 in | 1 |
| Hankook | 25.8–26 in | 800–804 | 7.5–9 in | 4 |
| Nitto | 26.1–26.18 in | — | 7.5–9 in | 2 |
| Toyo | 26.1 in | 796 | 7.5–9 in | 1 |
| Uniroyal | 26.1 in | 797 | 7.5–9 in | 1 |
Equivalent sizes on other wheels
Sizes that appear in the maker data books with a diameter within 3% of 225/40R19. Same diameter is only one part of fitting a different size.
| Wheel | Real sizes within 3% (closest first) |
|---|---|
| 15-inch | 235/60R15 , 215/65R15 , 205/70R15 |
| 16-inch | 255/50R16 , 215/60R16 , 225/55R16 |
| 17-inch | 255/45R17 , 285/40R17 , 235/50R17 |
| 18-inch | 295/35R18 , 255/40R18 , 225/45R18 |
| 20-inch | 255/30R20 , 305/25R20 , 225/35R20 |
Popular comparisons with 225/40R19
FAQ
How tall is a 225/40R19 tire?
26.1 inches (663 mm) calculated from the size code. Makers publish 25.8–26.3 in for real tires in this size; the difference comes from tread design and construction.
How do you work out the 225/40R19 diameter?
Sidewall = 225 mm × 40% = 90.0 mm. Diameter = 19 in wheel + 2 × 90.0 mm ÷ 25.4 = 26.09 in.
Is 225/40R19 a 26-inch tire?
It is about 26.1 in tall nominally, so it is close to 26 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 225/40R19?
Real sizes within 3% of its diameter include 255/50R16 (−0.2%), 255/45R17 (−0.2%), 295/35R18 (+0.2%) and 255/30R20 (−0.2%). 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 225/40R19 make?
About 773 calculated from its unloaded diameter. Makers publish 788–804 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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