Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
125/90r16 vs 195/55r16 Tire Comparison Side By Side
  125/90-16 195/55-16 Difference
Diameter inches (mm) 24.86 (631.4) 24.44 (620.9) -0.41 (-10.5) -1.7%
Width inches (mm) 4.92 (125) 7.68 (195) 2.76 (70) 56%
Circum. inches (mm) 78.09 (1983.6) 76.8 (1950.61) -1.3 (-32.99) -1.7%
Sidewall Height inches (mm) 4.43 (112.5) 4.22 (107.25) -0.21 (-5.25) -4.7%
Revolutions per mile (km) 811.32 (504.13) 825.04 (512.66) 13.72 (8.53) 1.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.67 mph (31.65 km/h)
25 mph (40.23 km/h)24.58 mph (39.56 km/h)
30 mph (48.28 km/h)29.5 mph (47.48 km/h)
35 mph (56.33 km/h)34.42 mph (55.39 km/h)
40 mph (64.37 km/h)39.33 mph (63.3 km/h)
45 mph (72.42 km/h)44.25 mph (71.22 km/h)
50 mph (80.47 km/h)49.17 mph (79.13 km/h)
55 mph (88.51 km/h)54.09 mph (87.04 km/h)
60 mph (96.56 km/h)59 mph (94.96 km/h)
65 mph (104.61 km/h)63.92 mph (102.87 km/h)
70 mph (112.65 km/h)68.84 mph (110.78 km/h)
75 mph (120.7 km/h)73.75 mph (118.69 km/h)
80 mph (128.75 km/h)78.67 mph (126.61 km/h)
85 mph (136.79 km/h)83.59 mph (134.52 km/h)
90 mph (144.84 km/h)88.5 mph (142.43 km/h)
95 mph (152.89 km/h)93.42 mph (150.35 km/h)
100 mph (160.93 km/h)98.34 mph (158.26 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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