Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/70r15 vs 205/70r15 Tire Comparison Side By Side
  195/70-15 205/70-15 Difference
Diameter inches (mm) 25.75 (654) 26.3 (668) 0.55 (14) 2.1%
Width inches (mm) 7.68 (195) 8.07 (205) 0.39 (10) 5.1%
Circum. inches (mm) 80.89 (2054.6) 82.62 (2098.58) 1.73 (43.98) 2.1%
Sidewall Height inches (mm) 5.37 (136.5) 5.65 (143.5) 0.28 (7) 5.1%
Revolutions per mile (km) 783.29 (486.71) 766.87 (476.51) -16.42 (-10.2) -2.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.43 mph (32.88 km/h)
25 mph (40.23 km/h)25.54 mph (41.09 km/h)
30 mph (48.28 km/h)30.64 mph (49.31 km/h)
35 mph (56.33 km/h)35.75 mph (57.53 km/h)
40 mph (64.37 km/h)40.86 mph (65.75 km/h)
45 mph (72.42 km/h)45.96 mph (73.97 km/h)
50 mph (80.47 km/h)51.07 mph (82.19 km/h)
55 mph (88.51 km/h)56.18 mph (90.41 km/h)
60 mph (96.56 km/h)61.28 mph (98.63 km/h)
65 mph (104.61 km/h)66.39 mph (106.85 km/h)
70 mph (112.65 km/h)71.5 mph (115.07 km/h)
75 mph (120.7 km/h)76.61 mph (123.28 km/h)
80 mph (128.75 km/h)81.71 mph (131.5 km/h)
85 mph (136.79 km/h)86.82 mph (139.72 km/h)
90 mph (144.84 km/h)91.93 mph (147.94 km/h)
95 mph (152.89 km/h)97.03 mph (156.16 km/h)
100 mph (160.93 km/h)102.14 mph (164.38 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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