Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/30-21 | 245/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.02 (686.4) | 27.75 (704.9) | 0.73 (18.5) 2.7% |
| Width inches (mm) | 10.04 (255) | 9.65 (245) | -0.39 (-10) -3.9% |
| Circum. inches (mm) | 84.9 (2156.39) | 87.19 (2214.51) | 2.29 (58.12) 2.7% |
| Sidewall Height inches (mm) | 3.01 (76.5) | 3.38 (85.75) | 0.36 (9.25) 12.1% |
| Revolutions per mile (km) | 746.31 (463.74) | 726.73 (451.57) | -19.59 (-12.17) -2.6% |
245/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.54 mph (33.05 km/h) |
| 25 mph (40.23 km/h) | 25.67 mph (41.32 km/h) |
| 30 mph (48.28 km/h) | 30.81 mph (49.58 km/h) |
| 35 mph (56.33 km/h) | 35.94 mph (57.85 km/h) |
| 40 mph (64.37 km/h) | 41.08 mph (66.11 km/h) |
| 45 mph (72.42 km/h) | 46.21 mph (74.37 km/h) |
| 50 mph (80.47 km/h) | 51.35 mph (82.64 km/h) |
| 55 mph (88.51 km/h) | 56.48 mph (90.9 km/h) |
| 60 mph (96.56 km/h) | 61.62 mph (99.16 km/h) |
| 65 mph (104.61 km/h) | 66.75 mph (107.43 km/h) |
| 70 mph (112.65 km/h) | 71.89 mph (115.69 km/h) |
| 75 mph (120.7 km/h) | 77.02 mph (123.95 km/h) |
| 80 mph (128.75 km/h) | 82.16 mph (132.22 km/h) |
| 85 mph (136.79 km/h) | 87.29 mph (140.48 km/h) |
| 90 mph (144.84 km/h) | 92.43 mph (148.75 km/h) |
| 95 mph (152.89 km/h) | 97.56 mph (157.01 km/h) |
| 100 mph (160.93 km/h) | 102.7 mph (165.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1849 | 2148 | 2314 | 2416 | 2526 | 2605 | 2691 | 2794 | 2935 | 3077 | 3234 | 3360 | 3589 | 3840 | 4037 | 4163 | 4234 | 4494 | 4856 | 5643 |
Better Fuel Economy Factory Ratios Increased Power
