TIRE SIZE SPECIFICATIONS GUIDE BY DIAMETER - 21" DIAMETER
| TIRE SIZE | WHEEL MIN | WHEEL MAX | DIAMETER | WIDTH | SIDEWALL |
| 235/35R21 | 8" | 9.5" | 27.5" | 9.3" | 3.2" |
| 235/45R21 | 8" | 9" | 29.3" | 9.3" | 4.2" |
| 235/50R21 | 8" | 9" | 30.3" | 9.3" | 4.6" |
| 245/30R21 | 8" | 9" | 26.8" | 9.6" | 2.9" |
| 245/35R21 | 8" | 9.5" | 27.8" | 9.6" | 3.4" |
| 245/40R21 | 8" | 9.5" | 28.7" | 9.6" | 3.9" |
| 245/45R21 | 7.5" | 9" | 29.7" | 9.6" | 4.3" |
| 245/50R21 | 7.5" | 9" | 30.6" | 9.6" | 4.8" |
| 255/30R21 | 8.5" | 9.5" | 27" | 10" | 3" |
| 255/35R21 | 8.5" | 10" | 28" | 10" | 3.5" |
| 255/40R21 | 8.5" | 10" | 29" | 10" | 4" |
| 255/50R21 | 7" | 9" | 31" | 10" | 5" |
| 265/30R21 | 9" | 10" | 27.3" | 10.4" | 3.1" |
| 265/35R21 | 9" | 10.5" | 28.3" | 10.4" | 3.7" |
| 265/40R21 | 9" | 10.5" | 29.3" | 10.4" | 4.2" |
| 265/45R21 | 8.5" | 10" | 30.4" | 10.4" | 4.7" |
| 265/50R21 | 8.5" | 10" | 31.4" | 10.4" | 5.2" |
| 275/25R21 | 10" | 10" | 26.4" | 10.8" | 2.7" |
| 275/30R21 | 9" | 10" | 27.5" | 10.8" | 3.2" |
| 275/35R21 | 9" | 11" | 28.6" | 10.8" | 3.8" |
| 275/40R21 | 9" | 11" | 29.7" | 10.8" | 4.3" |
| 275/45R21 | 8.5" | 10.5" | 30.7" | 10.8" | 4.9" |
| 275/50R21 | 7.5" | 9.5" | 31.8" | 10.8" | 5.4" |
| 275/55R21 | 7.5" | 9.5" | 32.9" | 10.8" | 6" |
| 285/30R21 | 9.5" | 10.5" | 27.7" | 11.2" | 3.4" |
| 285/35R21 | 9.5" | 11" | 28.9" | 11.2" | 3.9" |
| 285/40R21 | 9.5" | 11" | 30" | 11.2" | 4.5" |
| 285/45R21 | 9" | 10.5" | 31.1" | 11.2" | 5" |
| 295/25R21 | 10" | 11" | 26.8" | 11.6" | 2.9" |
| 295/30R21 | 10" | 11" | 28" | 11.6" | 3.5" |
| 295/35R21 | 10" | 11.5" | 29.1" | 11.6" | 4.1" |
| 295/40R21 | 10" | 11.5" | 30.3" | 11.6" | 4.6" |
| 305/25R21 | 10.5" | 11.5" | 27" | 12" | 3" |
| 305/30R21 | 10.5" | 11.5" | 28.2" | 12" | 3.6" |
| 305/35R21 | 10" | 12" | 29.4" | 12" | 4.2" |
| 315/30R21 | 10.5" | 11.5" | 28.4" | 12.4" | 3.7" |
| 315/35R21 | 10.5" | 12.5" | 29.7" | 12.4" | 4.3" |
| 315/40R21 | 10.5" | 12.5" | 30.9" | 12.4" | 5" |
| 315/45R21 | 10.5" | 12.5" | 32.2" | 12.4" | 5.6" |
| 325/25R21 | 11.5" | 12.5" | 27.4" | 12.8" | 3.2" |
| 325/30R21 | 11" | 12" | 28.7" | 12.8" | 3.8" |
| 325/40R21 | 11" | 13" | 31.2" | 12.8" | 5.1" |
| 325/45R21 | 11" | 13" | 32.5" | 12.8" | 5.8" |
| 355/25R21 | 12.5" | 13.5" | 28" | 14" | 3.5" |