Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/60r17 vs 235/60r17 Tire Comparison Side By Side
  195/60-17 235/60-17 Difference
Diameter inches (mm) 26.21 (665.8) 28.1 (713.8) 1.89 (48) 7.2%
Width inches (mm) 7.68 (195) 9.25 (235) 1.57 (40) 20.5%
Circum. inches (mm) 82.35 (2091.67) 88.29 (2242.47) 5.94 (150.8) 7.2%
Sidewall Height inches (mm) 4.61 (117) 5.55 (141) 0.94 (24) 20.5%
Revolutions per mile (km) 769.41 (478.09) 717.67 (445.94) -51.74 (-32.15) -6.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.44 mph (34.51 km/h)
25 mph (40.23 km/h)26.8 mph (43.13 km/h)
30 mph (48.28 km/h)32.16 mph (51.76 km/h)
35 mph (56.33 km/h)37.52 mph (60.39 km/h)
40 mph (64.37 km/h)42.88 mph (69.01 km/h)
45 mph (72.42 km/h)48.24 mph (77.64 km/h)
50 mph (80.47 km/h)53.6 mph (86.27 km/h)
55 mph (88.51 km/h)58.97 mph (94.9 km/h)
60 mph (96.56 km/h)64.33 mph (103.52 km/h)
65 mph (104.61 km/h)69.69 mph (112.15 km/h)
70 mph (112.65 km/h)75.05 mph (120.78 km/h)
75 mph (120.7 km/h)80.41 mph (129.4 km/h)
80 mph (128.75 km/h)85.77 mph (138.03 km/h)
85 mph (136.79 km/h)91.13 mph (146.66 km/h)
90 mph (144.84 km/h)96.49 mph (155.28 km/h)
95 mph (152.89 km/h)101.85 mph (163.91 km/h)
100 mph (160.93 km/h)107.21 mph (172.54 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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