Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/80-15 | 27/8.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.54 (725) | 27.08 (687.72) | -1.47 (-37.28) -5.1% |
| Width inches (mm) | 8.46 (215) | 8.5 (216) | 0.04 (1) 0.5% |
| Circum. inches (mm) | 89.67 (2277.65) | 85.06 (2160.54) | -4.61 (-117.12) -5.1% |
| Sidewall Height inches (mm) | 6.77 (172) | 6.04 (153.36) | -0.73 (-18.64) -10.8% |
| Revolutions per mile (km) | 706.58 (439.05) | 744.88 (462.85) | 38.3 (23.8) 5.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.97 mph (30.53 km/h) |
| 25 mph (40.23 km/h) | 23.71 mph (38.16 km/h) |
| 30 mph (48.28 km/h) | 28.46 mph (45.8 km/h) |
| 35 mph (56.33 km/h) | 33.2 mph (53.43 km/h) |
| 40 mph (64.37 km/h) | 37.94 mph (61.06 km/h) |
| 45 mph (72.42 km/h) | 42.69 mph (68.7 km/h) |
| 50 mph (80.47 km/h) | 47.43 mph (76.33 km/h) |
| 55 mph (88.51 km/h) | 52.17 mph (83.96 km/h) |
| 60 mph (96.56 km/h) | 56.91 mph (91.6 km/h) |
| 65 mph (104.61 km/h) | 61.66 mph (99.23 km/h) |
| 70 mph (112.65 km/h) | 66.4 mph (106.86 km/h) |
| 75 mph (120.7 km/h) | 71.14 mph (114.49 km/h) |
| 80 mph (128.75 km/h) | 75.89 mph (122.13 km/h) |
| 85 mph (136.79 km/h) | 80.63 mph (129.76 km/h) |
| 90 mph (144.84 km/h) | 85.37 mph (137.39 km/h) |
| 95 mph (152.89 km/h) | 90.12 mph (145.03 km/h) |
| 100 mph (160.93 km/h) | 94.86 mph (152.66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1896 | 2202 | 2371 | 2476 | 2589 | 2670 | 2759 | 2864 | 3009 | 3154 | 3315 | 3444 | 3678 | 3936 | 4138 | 4267 | 4340 | 4606 | 4977 | 5784 |
Better Fuel Economy Factory Ratios Increased Power
