Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/60r16 vs 195/55r16 Tire Comparison Side By Side
  185/60-16 195/55-16 Difference
Diameter inches (mm) 24.74 (628.4) 24.44 (620.9) -0.3 (-7.5) -1.2%
Width inches (mm) 7.28 (185) 7.68 (195) 0.39 (10) 5.4%
Circum. inches (mm) 77.72 (1974.18) 76.8 (1950.61) -0.93 (-23.56) -1.2%
Sidewall Height inches (mm) 4.37 (111) 4.22 (107.25) -0.15 (-3.75) -3.4%
Revolutions per mile (km) 815.2 (506.54) 825.04 (512.66) 9.85 (6.12) 1.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.76 mph (31.8 km/h)
25 mph (40.23 km/h)24.7 mph (39.75 km/h)
30 mph (48.28 km/h)29.64 mph (47.7 km/h)
35 mph (56.33 km/h)34.58 mph (55.65 km/h)
40 mph (64.37 km/h)39.52 mph (63.61 km/h)
45 mph (72.42 km/h)44.46 mph (71.56 km/h)
50 mph (80.47 km/h)49.4 mph (79.51 km/h)
55 mph (88.51 km/h)54.34 mph (87.46 km/h)
60 mph (96.56 km/h)59.28 mph (95.41 km/h)
65 mph (104.61 km/h)64.22 mph (103.36 km/h)
70 mph (112.65 km/h)69.16 mph (111.31 km/h)
75 mph (120.7 km/h)74.1 mph (119.26 km/h)
80 mph (128.75 km/h)79.05 mph (127.21 km/h)
85 mph (136.79 km/h)83.99 mph (135.16 km/h)
90 mph (144.84 km/h)88.93 mph (143.11 km/h)
95 mph (152.89 km/h)93.87 mph (151.06 km/h)
100 mph (160.93 km/h)98.81 mph (159.01 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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