Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 325/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 38.47 (977.2) | 5.87 (149) 18% |
| Width inches (mm) | 12.01 (305) | 12.8 (325) | 0.79 (20) 6.6% |
| Circum. inches (mm) | 102.44 (2601.87) | 120.86 (3069.96) | 18.43 (468.1) 18% |
| Sidewall Height inches (mm) | 4.8 (122) | 10.24 (260) | 5.43 (138) 113.1% |
| Revolutions per mile (km) | 618.53 (384.34) | 524.22 (325.74) | -94.31 (-58.6) -15.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.6 mph (37.98 km/h) |
| 25 mph (40.23 km/h) | 29.5 mph (47.47 km/h) |
| 30 mph (48.28 km/h) | 35.4 mph (56.97 km/h) |
| 35 mph (56.33 km/h) | 41.3 mph (66.46 km/h) |
| 40 mph (64.37 km/h) | 47.2 mph (75.96 km/h) |
| 45 mph (72.42 km/h) | 53.1 mph (85.45 km/h) |
| 50 mph (80.47 km/h) | 59 mph (94.94 km/h) |
| 55 mph (88.51 km/h) | 64.89 mph (104.44 km/h) |
| 60 mph (96.56 km/h) | 70.79 mph (113.93 km/h) |
| 65 mph (104.61 km/h) | 76.69 mph (123.43 km/h) |
| 70 mph (112.65 km/h) | 82.59 mph (132.92 km/h) |
| 75 mph (120.7 km/h) | 88.49 mph (142.42 km/h) |
| 80 mph (128.75 km/h) | 94.39 mph (151.91 km/h) |
| 85 mph (136.79 km/h) | 100.29 mph (161.4 km/h) |
| 90 mph (144.84 km/h) | 106.19 mph (170.9 km/h) |
| 95 mph (152.89 km/h) | 112.09 mph (180.39 km/h) |
| 100 mph (160.93 km/h) | 117.99 mph (189.89 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1334 | 1550 | 1669 | 1743 | 1822 | 1879 | 1941 | 2015 | 2117 | 2220 | 2333 | 2424 | 2589 | 2770 | 2912 | 3003 | 3054 | 3241 | 3503 | 4070 |
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