Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
31/10r15 vs 295/50r15 Tire Comparison Side By Side
  31/10-15 295/50-15 Difference
Diameter inches (mm) 31 (787.4) 26.61 (676) -4.39 (-111.4) -14.1%
Width inches (mm) 10 (254) 11.61 (295) 1.61 (41) 16.1%
Circum. inches (mm) 97.39 (2473.69) 83.61 (2123.72) -13.78 (-349.97) -14.1%
Sidewall Height inches (mm) 8 (203.2) 5.81 (147.5) -2.19 (-55.7) -27.4%
Revolutions per mile (km) 650.58 (404.25) 757.8 (470.87) 107.21 (66.62) 16.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.17 mph (27.63 km/h)
25 mph (40.23 km/h)21.46 mph (34.54 km/h)
30 mph (48.28 km/h)25.76 mph (41.45 km/h)
35 mph (56.33 km/h)30.05 mph (48.36 km/h)
40 mph (64.37 km/h)34.34 mph (55.27 km/h)
45 mph (72.42 km/h)38.63 mph (62.17 km/h)
50 mph (80.47 km/h)42.93 mph (69.08 km/h)
55 mph (88.51 km/h)47.22 mph (75.99 km/h)
60 mph (96.56 km/h)51.51 mph (82.9 km/h)
65 mph (104.61 km/h)55.8 mph (89.81 km/h)
70 mph (112.65 km/h)60.1 mph (96.72 km/h)
75 mph (120.7 km/h)64.39 mph (103.62 km/h)
80 mph (128.75 km/h)68.68 mph (110.53 km/h)
85 mph (136.79 km/h)72.97 mph (117.44 km/h)
90 mph (144.84 km/h)77.27 mph (124.35 km/h)
95 mph (152.89 km/h)81.56 mph (131.26 km/h)
100 mph (160.93 km/h)85.85 mph (138.17 km/h)

Gear Ratio / RPMs for New Tire (@ 65 mph)
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
19282240241325192634271628072913306132093373350437424005421043414415468650635884
Better Fuel Economy Factory Ratios Increased Power

Most Popular 31/10-R15 Comparisons

To Top