Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/35-21 | 265/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.68 (753.9) | 29.48 (748.7) | -0.2 (-5.2) -0.7% |
| Width inches (mm) | 12.4 (315) | 10.43 (265) | -1.97 (-50) -15.9% |
| Circum. inches (mm) | 93.25 (2368.45) | 92.6 (2352.11) | -0.64 (-16.34) -0.7% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 5.74 (145.75) | 1.4 (35.5) 32.2% |
| Revolutions per mile (km) | 679.49 (422.22) | 684.21 (425.15) | 4.72 (2.93) 0.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.86 mph (31.96 km/h) |
| 25 mph (40.23 km/h) | 24.83 mph (39.96 km/h) |
| 30 mph (48.28 km/h) | 29.79 mph (47.95 km/h) |
| 35 mph (56.33 km/h) | 34.76 mph (55.94 km/h) |
| 40 mph (64.37 km/h) | 39.72 mph (63.93 km/h) |
| 45 mph (72.42 km/h) | 44.69 mph (71.92 km/h) |
| 50 mph (80.47 km/h) | 49.66 mph (79.91 km/h) |
| 55 mph (88.51 km/h) | 54.62 mph (87.9 km/h) |
| 60 mph (96.56 km/h) | 59.59 mph (95.89 km/h) |
| 65 mph (104.61 km/h) | 64.55 mph (103.89 km/h) |
| 70 mph (112.65 km/h) | 69.52 mph (111.88 km/h) |
| 75 mph (120.7 km/h) | 74.48 mph (119.87 km/h) |
| 80 mph (128.75 km/h) | 79.45 mph (127.86 km/h) |
| 85 mph (136.79 km/h) | 84.41 mph (135.85 km/h) |
| 90 mph (144.84 km/h) | 89.38 mph (143.84 km/h) |
| 95 mph (152.89 km/h) | 94.34 mph (151.83 km/h) |
| 100 mph (160.93 km/h) | 99.31 mph (159.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1741 | 2023 | 2178 | 2275 | 2378 | 2452 | 2534 | 2630 | 2764 | 2897 | 3045 | 3164 | 3379 | 3616 | 3801 | 3920 | 3986 | 4231 | 4572 | 5312 |
Better Fuel Economy Factory Ratios Increased Power
