Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/80r16 vs 225/60r17 Tire Comparison Side By Side
  135/80-16 225/60-17 Difference
Diameter inches (mm) 24.5 (622.4) 27.63 (701.8) 3.13 (79.4) 12.8%
Width inches (mm) 5.31 (135) 8.86 (225) 3.54 (90) 66.7%
Circum. inches (mm) 76.98 (1955.33) 86.8 (2204.77) 9.82 (249.44) 12.8%
Sidewall Height inches (mm) 4.25 (108) 5.31 (135) 1.06 (27) 25%
Revolutions per mile (km) 823.06 (511.42) 729.94 (453.56) -93.12 (-57.86) -11.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.55 mph (36.29 km/h)
25 mph (40.23 km/h)28.19 mph (45.37 km/h)
30 mph (48.28 km/h)33.83 mph (54.44 km/h)
35 mph (56.33 km/h)39.46 mph (63.51 km/h)
40 mph (64.37 km/h)45.1 mph (72.59 km/h)
45 mph (72.42 km/h)50.74 mph (81.66 km/h)
50 mph (80.47 km/h)56.38 mph (90.73 km/h)
55 mph (88.51 km/h)62.02 mph (99.81 km/h)
60 mph (96.56 km/h)67.65 mph (108.88 km/h)
65 mph (104.61 km/h)73.29 mph (117.95 km/h)
70 mph (112.65 km/h)78.93 mph (127.03 km/h)
75 mph (120.7 km/h)84.57 mph (136.1 km/h)
80 mph (128.75 km/h)90.21 mph (145.17 km/h)
85 mph (136.79 km/h)95.84 mph (154.25 km/h)
90 mph (144.84 km/h)101.48 mph (163.32 km/h)
95 mph (152.89 km/h)107.12 mph (172.39 km/h)
100 mph (160.93 km/h)112.76 mph (181.47 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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