Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
31/10.5r16 vs 255/70r16 Tire Comparison Side By Side
  31/10.5-16 255/70-16 Difference
Diameter inches (mm) 30.93 (785.54) 30.06 (763.4) -0.87 (-22.14) -2.8%
Width inches (mm) 10.51 (267) 10.04 (255) -0.47 (-12) -4.5%
Circum. inches (mm) 97.16 (2467.85) 94.42 (2398.29) -2.74 (-69.55) -2.8%
Sidewall Height inches (mm) 7.46 (189.57) 7.03 (178.5) -0.44 (-11.07) -5.8%
Revolutions per mile (km) 652.12 (405.21) 671.04 (416.96) 18.91 (11.75) 2.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.44 mph (31.28 km/h)
25 mph (40.23 km/h)24.3 mph (39.1 km/h)
30 mph (48.28 km/h)29.15 mph (46.92 km/h)
35 mph (56.33 km/h)34.01 mph (54.74 km/h)
40 mph (64.37 km/h)38.87 mph (62.56 km/h)
45 mph (72.42 km/h)43.73 mph (70.38 km/h)
50 mph (80.47 km/h)48.59 mph (78.2 km/h)
55 mph (88.51 km/h)53.45 mph (86.02 km/h)
60 mph (96.56 km/h)58.31 mph (93.84 km/h)
65 mph (104.61 km/h)63.17 mph (101.66 km/h)
70 mph (112.65 km/h)68.03 mph (109.48 km/h)
75 mph (120.7 km/h)72.89 mph (117.3 km/h)
80 mph (128.75 km/h)77.75 mph (125.12 km/h)
85 mph (136.79 km/h)82.6 mph (132.94 km/h)
90 mph (144.84 km/h)87.46 mph (140.76 km/h)
95 mph (152.89 km/h)92.32 mph (148.58 km/h)
100 mph (160.93 km/h)97.18 mph (156.4 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
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