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245/45R18 tires
245/45R18 reads off the tire sidewall: 245 mm of section width, a sidewall whose height is 45% of that width, and a 18 in mounting diameter.
- 2 models
Models
The models we carry in this size, sorted by brand.
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This size, measured
These figures are derived from the three numbers, not entered by hand: it is the same arithmetic as the size equivalence calculator.
- Sidewall height
- 110.3 mm
- Overall diameter
- 677.7 mm · 26.68 in
- Circumference
- 2,129.1 mm · 83.82 in
- Revolutions per mile
- 756 rev.
- Section width
- 9.65 in
- Usable mounting width
- 7 to 8.5 in
Usable mounting width is a trade rule of thumb, roughly 70 to 90% of section width. It is not a standard. The exact range is whatever the manufacturer publishes for that model.
Equivalent sizes
Sizes whose overall diameter stays within 3% of this one. The ones we carry link to their own page. These are computed suggestions, not a guarantee of fit: the vehicle manual decides.
| Size | Overall diameter | Gap | In the catalogue |
|---|---|---|---|
| 245/45R18Original size | 677.7 mm | 0 %Identical diameter | — |
| 275/40R18 | 677.2 mm | -0.07 %Within tolerance | — |
| 245/40R19 | 678.6 mm | +0.13 %Within tolerance | In the catalogue |
| 245/50R17 | 676.8 mm | -0.13 %Within tolerance | — |
| 225/60R16 | 676.4 mm | -0.19 %Within tolerance | In the catalogue |
| 215/45R19 | 676.1 mm | -0.24 %Within tolerance | — |
| 225/55R17 | 679.3 mm | +0.24 %Within tolerance | In the catalogue |
| 275/45R17 | 679.3 mm | +0.24 %Within tolerance | — |
| 245/35R20 | 679.5 mm | +0.27 %Within tolerance | In the catalogue |
| 245/55R16 | 675.9 mm | -0.27 %Within tolerance | — |
| 215/40R20 | 680 mm | +0.34 %Within tolerance | — |
| 275/35R19 | 675.1 mm | -0.38 %Within tolerance | In the catalogue |
| 275/50R16 | 681.4 mm | +0.55 %Within tolerance | — |
| 225/50R18 | 682.2 mm | +0.66 %Within tolerance | In the catalogue |
| 275/30R20 | 673 mm | -0.69 %Within tolerance | — |
| 235/35R20 | 672.5 mm | -0.77 %Within tolerance | — |
| 215/50R18 | 672.2 mm | -0.81 %Within tolerance | In the catalogue |
| 235/40R19 | 670.6 mm | -1.05 %Within tolerance | In the catalogue |
| 225/45R19 | 685.1 mm | +1.09 %Within tolerance | In the catalogue |
| 215/65R16 | 685.9 mm | +1.21 %Within tolerance | In the catalogue |
| 255/35R20 | 686.5 mm | +1.3 %Within tolerance | In the catalogue |
| 255/40R19 | 686.6 mm | +1.31 %Within tolerance | In the catalogue |
| 235/45R18 | 668.7 mm | -1.33 %Within tolerance | In the catalogue |
| 215/55R17 | 668.3 mm | -1.39 %Within tolerance | In the catalogue |
| 235/60R16 | 688.4 mm | +1.58 %Within tolerance | In the catalogue |
| 215/60R17 | 689.8 mm | +1.79 %Within tolerance | In the catalogue |
| 235/55R17 | 690.3 mm | +1.86 %Within tolerance | In the catalogue |
| 215/60R16 | 664.4 mm | -1.96 %Within tolerance | In the catalogue |
| 235/50R18 | 692.2 mm | +2.14 %For reference only | In the catalogue |
| 225/40R19 | 662.6 mm | -2.23 %For reference only | In the catalogue |
| 215/55R18 | 693.7 mm | +2.36 %For reference only | In the catalogue |
| 235/45R19 | 694.1 mm | +2.42 %For reference only | In the catalogue |
| 255/35R19 | 661.1 mm | -2.45 %For reference only | In the catalogue |
| 225/45R18 | 659.7 mm | -2.66 %For reference only | In the catalogue |
Other ways to browse
Every size, every brand and every season has its own page: the models offered, the technical sheet and the equivalents.