Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
115/70r16 vs 195/55r16 Tire Comparison Side By Side
  115/70-16 195/55-16 Difference
Diameter inches (mm) 22.34 (567.4) 24.44 (620.9) 2.11 (53.5) 9.4%
Width inches (mm) 4.53 (115) 7.68 (195) 3.15 (80) 69.6%
Circum. inches (mm) 70.18 (1782.54) 76.8 (1950.61) 6.62 (168.08) 9.4%
Sidewall Height inches (mm) 3.17 (80.5) 4.22 (107.25) 1.05 (26.75) 33.2%
Revolutions per mile (km) 902.84 (561) 825.04 (512.66) -77.79 (-48.34) -8.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.89 mph (35.22 km/h)
25 mph (40.23 km/h)27.36 mph (44.03 km/h)
30 mph (48.28 km/h)32.83 mph (52.83 km/h)
35 mph (56.33 km/h)38.3 mph (61.64 km/h)
40 mph (64.37 km/h)43.77 mph (70.44 km/h)
45 mph (72.42 km/h)49.24 mph (79.25 km/h)
50 mph (80.47 km/h)54.71 mph (88.05 km/h)
55 mph (88.51 km/h)60.19 mph (96.86 km/h)
60 mph (96.56 km/h)65.66 mph (105.67 km/h)
65 mph (104.61 km/h)71.13 mph (114.47 km/h)
70 mph (112.65 km/h)76.6 mph (123.28 km/h)
75 mph (120.7 km/h)82.07 mph (132.08 km/h)
80 mph (128.75 km/h)87.54 mph (140.89 km/h)
85 mph (136.79 km/h)93.01 mph (149.69 km/h)
90 mph (144.84 km/h)98.49 mph (158.5 km/h)
95 mph (152.89 km/h)103.96 mph (167.3 km/h)
100 mph (160.93 km/h)109.43 mph (176.11 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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