Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 280/85-16 | 34/12.5-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.74 (882.4) | 34.03 (864.32) | -0.71 (-18.08) -2% |
| Width inches (mm) | 11.02 (280) | 12.52 (318) | 1.5 (38) 13.6% |
| Circum. inches (mm) | 109.14 (2772.14) | 106.9 (2715.34) | -2.24 (-56.8) -2% |
| Sidewall Height inches (mm) | 9.37 (238) | 9.01 (228.96) | -0.36 (-9.04) -3.8% |
| Revolutions per mile (km) | 580.54 (360.73) | 592.69 (368.28) | 12.14 (7.55) 2.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.59 mph (31.53 km/h) |
| 25 mph (40.23 km/h) | 24.49 mph (39.41 km/h) |
| 30 mph (48.28 km/h) | 29.39 mph (47.29 km/h) |
| 35 mph (56.33 km/h) | 34.28 mph (55.17 km/h) |
| 40 mph (64.37 km/h) | 39.18 mph (63.05 km/h) |
| 45 mph (72.42 km/h) | 44.08 mph (70.94 km/h) |
| 50 mph (80.47 km/h) | 48.98 mph (78.82 km/h) |
| 55 mph (88.51 km/h) | 53.87 mph (86.7 km/h) |
| 60 mph (96.56 km/h) | 58.77 mph (94.58 km/h) |
| 65 mph (104.61 km/h) | 63.67 mph (102.46 km/h) |
| 70 mph (112.65 km/h) | 68.57 mph (110.35 km/h) |
| 75 mph (120.7 km/h) | 73.46 mph (118.23 km/h) |
| 80 mph (128.75 km/h) | 78.36 mph (126.11 km/h) |
| 85 mph (136.79 km/h) | 83.26 mph (133.99 km/h) |
| 90 mph (144.84 km/h) | 88.16 mph (141.87 km/h) |
| 95 mph (152.89 km/h) | 93.05 mph (149.76 km/h) |
| 100 mph (160.93 km/h) | 97.95 mph (157.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1508 | 1752 | 1887 | 1970 | 2060 | 2124 | 2195 | 2278 | 2394 | 2510 | 2638 | 2741 | 2927 | 3132 | 3293 | 3395 | 3453 | 3665 | 3960 | 4602 |
Better Fuel Economy Factory Ratios Increased Power
