Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-15 | 33/12.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.35 (771) | 33.03 (838.92) | 2.67 (67.92) 8.8% |
| Width inches (mm) | 12.8 (325) | 12.52 (318) | -0.28 (-7) -2.2% |
| Circum. inches (mm) | 95.36 (2422.17) | 103.76 (2635.54) | 8.4 (213.38) 8.8% |
| Sidewall Height inches (mm) | 7.68 (195) | 9.01 (228.96) | 1.34 (33.96) 17.4% |
| Revolutions per mile (km) | 664.42 (412.85) | 610.63 (379.43) | -53.79 (-33.43) -8.1% |
33/12.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.76 mph (35.02 km/h) |
| 25 mph (40.23 km/h) | 27.2 mph (43.78 km/h) |
| 30 mph (48.28 km/h) | 32.64 mph (52.53 km/h) |
| 35 mph (56.33 km/h) | 38.08 mph (61.29 km/h) |
| 40 mph (64.37 km/h) | 43.52 mph (70.04 km/h) |
| 45 mph (72.42 km/h) | 48.96 mph (78.8 km/h) |
| 50 mph (80.47 km/h) | 54.4 mph (87.56 km/h) |
| 55 mph (88.51 km/h) | 59.85 mph (96.31 km/h) |
| 60 mph (96.56 km/h) | 65.29 mph (105.07 km/h) |
| 65 mph (104.61 km/h) | 70.73 mph (113.82 km/h) |
| 70 mph (112.65 km/h) | 76.17 mph (122.58 km/h) |
| 75 mph (120.7 km/h) | 81.61 mph (131.33 km/h) |
| 80 mph (128.75 km/h) | 87.05 mph (140.09 km/h) |
| 85 mph (136.79 km/h) | 92.49 mph (148.85 km/h) |
| 90 mph (144.84 km/h) | 97.93 mph (157.6 km/h) |
| 95 mph (152.89 km/h) | 103.37 mph (166.36 km/h) |
| 100 mph (160.93 km/h) | 108.81 mph (175.11 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1554 | 1805 | 1944 | 2030 | 2123 | 2189 | 2261 | 2347 | 2466 | 2585 | 2718 | 2824 | 3015 | 3227 | 3392 | 3498 | 3558 | 3776 | 4080 | 4741 |
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