Conversion Table: Star Rating to Ply Rating
In case of radial OTR tires, normally star rating is used to indicate its load capacity, instead of ply-rating (PR for short), which is used on bias OTR tires.
Here is the coversion table from Star-rating to ply-rating.
| Service | Tire Size | Star Rating | Corresponding Ply Rating | ||
| Grader | 14.00R24 | ★ | up to 16 | ||
| 16.00R24 | ★ | up to 16 | |||
| 17.5R25 | ★ | up to 16 | |||
| Earthmover | 12.00R24 | ★ ★ ★ | up to 24 | ||
| 14.00R24 | ★ ★ ★ | up to 32 | |||
| 14.00R25 | ★ ★ ★ | up to 32 | |||
| 16.00R25 | ★ ★ | up to 36 | |||
| 18.00R25 | ★ | up to 24 | |||
| 18.00R25 | ★ ★ | up to 36 | |||
| 18.00R33 | ★ ★ | up to 40 | |||
| 21.00R33 | ★ ★ | up to 36 | |||
| 21.00R35 | ★ ★ | up to 44 | |||
| 24.00R35 | ★ ★ | up to 48 | |||
| 24.00R35 | ★ ★ | up to 48 | |||
| 27.00R49 | ★ ★ | up to 54 | |||
| 30.00R51 | ★ ★ | up to 58 | |||
| 33.00R51 | ★ ★ | up to 64 | |||
| 36.00R51 | ★ ★ | up to 66 | |||
| 40.00R57 | ★ ★ | up to 74 | |||
| 17.5R25 | ★ | up to 16 | |||
| 20.5R25 | ★ | up to 24 | |||
| 20.5R25 | ★ ★ | up to 28 | |||
| 25/65R25 | ★ ★ | up to 32 | |||
| 23.5R25 | ★ | up to 24 | |||
| 23.5R25 | ★ ★ | up to 32 | |||
| 26.5R25 | ★ ★ | up to 32 | |||
| 29.5R25 | ★ ★ | up to 34 | |||
| 29.5R29 | ★ ★ | up to 40 | |||
| 33.25R29 | ★ ★ | up to 44 | |||
| 37.5R33 | ★ ★ | up to 48 | |||
| 33.25R35 | ★ ★ | up to 44 | |||
| 37.25R35 | ★ ★ | up to 48 | |||
| 37.5R39 | ★ ★ | up to 52 | |||
| 40.5R/75R39 | ★ ★ | up to 54 | |||
| Loader | 15.5R25 | ★ | up to 16 | ||
| 17.5R25 | ★ | up to 16 | |||
| 20.5R25 | ★ | up to 24 | |||
| 20.5R25 | ★ ★ | up to 28 | |||
| 23.5R25 | ★ | up to 24 | |||
| 23.5R25 | ★ ★ | up to 32 | |||
| 26.5R25 | ★ | up to 24 | |||
| 26.5R25 | ★ ★ | up to 36 | |||
| 29.5R25 | ★ | up to 28 | |||
| 29.5R25 | ★ ★ | up to 34 | |||
| 29.5R29 | ★ | up to 34 | |||
| 35/655R33 | ★ | up to 36 | |||
| 45/65R45 | ★ | up to 50 | |||