Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 90/70-10 | 120/90-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 14.96 (380) | 28.5 (724) | 13.54 (344) 90.5% |
| Width inches (mm) | 3.54 (90) | 4.72 (120) | 1.18 (30) 33.3% |
| Circum. inches (mm) | 47 (1193.81) | 89.55 (2274.51) | 42.55 (1080.71) 90.5% |
| Sidewall Height inches (mm) | 2.48 (63) | 4.25 (108) | 1.77 (45) 71.4% |
| Revolutions per mile (km) | 1348.08 (837.66) | 707.56 (439.65) | -640.52 (-398) -47.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 38.11 mph (61.32 km/h) |
| 25 mph (40.23 km/h) | 47.63 mph (76.66 km/h) |
| 30 mph (48.28 km/h) | 57.16 mph (91.99 km/h) |
| 35 mph (56.33 km/h) | 66.68 mph (107.32 km/h) |
| 40 mph (64.37 km/h) | 76.21 mph (122.65 km/h) |
| 45 mph (72.42 km/h) | 85.74 mph (137.98 km/h) |
| 50 mph (80.47 km/h) | 95.26 mph (153.31 km/h) |
| 55 mph (88.51 km/h) | 104.79 mph (168.64 km/h) |
| 60 mph (96.56 km/h) | 114.32 mph (183.97 km/h) |
| 65 mph (104.61 km/h) | 123.84 mph (199.3 km/h) |
| 70 mph (112.65 km/h) | 133.37 mph (214.64 km/h) |
| 75 mph (120.7 km/h) | 142.89 mph (229.97 km/h) |
| 80 mph (128.75 km/h) | 152.42 mph (245.3 km/h) |
| 85 mph (136.79 km/h) | 161.95 mph (260.63 km/h) |
| 90 mph (144.84 km/h) | 171.47 mph (275.96 km/h) |
| 95 mph (152.89 km/h) | 181 mph (291.29 km/h) |
| 100 mph (160.93 km/h) | 190.53 mph (306.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1801 | 2092 | 2253 | 2352 | 2460 | 2536 | 2620 | 2720 | 2858 | 2996 | 3149 | 3272 | 3494 | 3739 | 3931 | 4053 | 4122 | 4375 | 4728 | 5494 |
Better Fuel Economy Factory Ratios Increased Power
