12 sizes for 18″ to 23″ wheels, with the heights and widths their makers list.
| Size | Height ″ | Listed width ″ | Tires |
|---|---|---|---|
| 325/60R18 | 33.3 ≈33 | 13.0 | 1 |
| 325/65R18 | 34.6 ≈35 | 13.0 | 2 |
| 325/30R19 | 26.7 ≈27 | 13.0 | 7 |
| 325/25R20 | 26.4 | 13.2 | 1 |
| 325/30R20 | 27.7 ≈28 | 13.0 | 7 |
| 325/60R20 | 35.4 ≈35 | 13.0 | 5 |
| 325/25R21 | 27.4 ≈27 | 13.2 | 1 |
| 325/30R21 | 28.7 ≈29 | 13.0 | 15 |
| 325/35R22 | 31.0 ≈31 | 13.0 | 1 |
| 325/40R22 | 32.2 ≈32 | 13.0 | 1 |
| 325/50R22 | 34.8–35.1 ≈35 | 12.8–13.2 | 8 |
| 325/35R23 | 32.0 ≈32 | 13.0 | 1 |
Nominal widths from the size code.
12.8 inches wide (325 mm). The 325 only gives the width. Height comes from the rest of the size, so the 12 sizes of this width here run from 26.4″ to 35.4″ tall: 325/65R18 is about 34.6″, 325/60R20 is about 35.4″ and 325/30R21 is about 28.7″.
Some are. The 325 sizes that come out about 35″ tall are 325/65R18, 325/60R20 and 325/50R22. 325s as a whole run from 26.4″ to 35.4″ tall, so check the full size, not just the width.
10 mm, or 0.39″ on paper: about 0.20″ more on each side.
The size code gives 12.8″. The widths the makers publish for the 49 325 tires here run from 12.8″ to 13.2″. Toyo publishes overall width; BFGoodrich, Michelin and Mickey Thompson publish section width.