Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 27/8.5-15 | 29/12.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.08 (687.72) | 29.02 (737.16) | 1.95 (49.44) 7.2% |
| Width inches (mm) | 8.5 (216) | 12.52 (318) | 4.02 (102) 47.2% |
| Circum. inches (mm) | 85.06 (2160.54) | 91.18 (2315.86) | 6.11 (155.32) 7.2% |
| Sidewall Height inches (mm) | 6.04 (153.36) | 7.01 (178.08) | 0.97 (24.72) 16.1% |
| Revolutions per mile (km) | 744.88 (462.85) | 694.92 (431.8) | -49.96 (-31.04) -6.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.44 mph (34.5 km/h) |
| 25 mph (40.23 km/h) | 26.8 mph (43.13 km/h) |
| 30 mph (48.28 km/h) | 32.16 mph (51.75 km/h) |
| 35 mph (56.33 km/h) | 37.52 mph (60.38 km/h) |
| 40 mph (64.37 km/h) | 42.88 mph (69 km/h) |
| 45 mph (72.42 km/h) | 48.24 mph (77.63 km/h) |
| 50 mph (80.47 km/h) | 53.59 mph (86.25 km/h) |
| 55 mph (88.51 km/h) | 58.95 mph (94.88 km/h) |
| 60 mph (96.56 km/h) | 64.31 mph (103.5 km/h) |
| 65 mph (104.61 km/h) | 69.67 mph (112.13 km/h) |
| 70 mph (112.65 km/h) | 75.03 mph (120.75 km/h) |
| 75 mph (120.7 km/h) | 80.39 mph (129.38 km/h) |
| 80 mph (128.75 km/h) | 85.75 mph (138 km/h) |
| 85 mph (136.79 km/h) | 91.11 mph (146.63 km/h) |
| 90 mph (144.84 km/h) | 96.47 mph (155.25 km/h) |
| 95 mph (152.89 km/h) | 101.83 mph (163.88 km/h) |
| 100 mph (160.93 km/h) | 107.19 mph (172.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1768 | 2054 | 2212 | 2310 | 2416 | 2491 | 2574 | 2671 | 2807 | 2942 | 3093 | 3213 | 3432 | 3672 | 3860 | 3981 | 4049 | 4297 | 4643 | 5396 |
Better Fuel Economy Factory Ratios Increased Power
