Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/35-20 | 255/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.41 (721.5) | 27.03 (686.6) | -1.37 (-34.9) -4.8% |
| Width inches (mm) | 12.01 (305) | 10.04 (255) | -1.97 (-50) -16.4% |
| Circum. inches (mm) | 89.24 (2266.66) | 84.92 (2157.02) | -4.32 (-109.64) -4.8% |
| Sidewall Height inches (mm) | 4.2 (106.75) | 4.02 (102) | -0.19 (-4.75) -4.4% |
| Revolutions per mile (km) | 710.01 (441.18) | 746.1 (463.6) | 36.09 (22.43) 5.1% |
255/40-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.03 mph (30.63 km/h) |
| 25 mph (40.23 km/h) | 23.79 mph (38.29 km/h) |
| 30 mph (48.28 km/h) | 28.55 mph (45.95 km/h) |
| 35 mph (56.33 km/h) | 33.31 mph (53.6 km/h) |
| 40 mph (64.37 km/h) | 38.07 mph (61.26 km/h) |
| 45 mph (72.42 km/h) | 42.82 mph (68.92 km/h) |
| 50 mph (80.47 km/h) | 47.58 mph (76.58 km/h) |
| 55 mph (88.51 km/h) | 52.34 mph (84.23 km/h) |
| 60 mph (96.56 km/h) | 57.1 mph (91.89 km/h) |
| 65 mph (104.61 km/h) | 61.86 mph (99.55 km/h) |
| 70 mph (112.65 km/h) | 66.61 mph (107.21 km/h) |
| 75 mph (120.7 km/h) | 71.37 mph (114.86 km/h) |
| 80 mph (128.75 km/h) | 76.13 mph (122.52 km/h) |
| 85 mph (136.79 km/h) | 80.89 mph (130.18 km/h) |
| 90 mph (144.84 km/h) | 85.65 mph (137.84 km/h) |
| 95 mph (152.89 km/h) | 90.4 mph (145.49 km/h) |
| 100 mph (160.93 km/h) | 95.16 mph (153.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1899 | 2206 | 2375 | 2480 | 2594 | 2674 | 2763 | 2868 | 3014 | 3159 | 3321 | 3450 | 3684 | 3943 | 4145 | 4274 | 4347 | 4613 | 4985 | 5793 |
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