Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/35-21 | 285/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.03 (711.9) | 27.73 (704.4) | -0.3 (-7.5) -1.1% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 88.05 (2236.5) | 87.12 (2212.94) | -0.93 (-23.56) -1.1% |
| Sidewall Height inches (mm) | 3.51 (89.25) | 3.37 (85.5) | -0.15 (-3.75) -4.2% |
| Revolutions per mile (km) | 719.58 (447.13) | 727.24 (451.89) | 7.66 (4.76) 1.1% |
285/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.79 mph (31.85 km/h) |
| 25 mph (40.23 km/h) | 24.74 mph (39.81 km/h) |
| 30 mph (48.28 km/h) | 29.68 mph (47.77 km/h) |
| 35 mph (56.33 km/h) | 34.63 mph (55.73 km/h) |
| 40 mph (64.37 km/h) | 39.58 mph (63.7 km/h) |
| 45 mph (72.42 km/h) | 44.53 mph (71.66 km/h) |
| 50 mph (80.47 km/h) | 49.47 mph (79.62 km/h) |
| 55 mph (88.51 km/h) | 54.42 mph (87.58 km/h) |
| 60 mph (96.56 km/h) | 59.37 mph (95.54 km/h) |
| 65 mph (104.61 km/h) | 64.32 mph (103.51 km/h) |
| 70 mph (112.65 km/h) | 69.26 mph (111.47 km/h) |
| 75 mph (120.7 km/h) | 74.21 mph (119.43 km/h) |
| 80 mph (128.75 km/h) | 79.16 mph (127.39 km/h) |
| 85 mph (136.79 km/h) | 84.1 mph (135.35 km/h) |
| 90 mph (144.84 km/h) | 89.05 mph (143.32 km/h) |
| 95 mph (152.89 km/h) | 94 mph (151.28 km/h) |
| 100 mph (160.93 km/h) | 98.95 mph (159.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1851 | 2150 | 2315 | 2418 | 2528 | 2607 | 2693 | 2796 | 2937 | 3079 | 3237 | 3363 | 3591 | 3843 | 4040 | 4166 | 4237 | 4497 | 4859 | 5647 |
Better Fuel Economy Factory Ratios Increased Power
