Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/70r14 vs 195/70r14 Tire Comparison Side By Side
  185/70-14 195/70-14 Difference
Diameter inches (mm) 24.2 (614.6) 24.75 (628.6) 0.55 (14) 2.3%
Width inches (mm) 7.28 (185) 7.68 (195) 0.39 (10) 5.4%
Circum. inches (mm) 76.02 (1930.82) 77.75 (1974.81) 1.73 (43.98) 2.3%
Sidewall Height inches (mm) 5.1 (129.5) 5.37 (136.5) 0.28 (7) 5.4%
Revolutions per mile (km) 833.5 (517.91) 814.94 (506.38) -18.56 (-11.53) -2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.46 mph (32.92 km/h)
25 mph (40.23 km/h)25.57 mph (41.15 km/h)
30 mph (48.28 km/h)30.68 mph (49.38 km/h)
35 mph (56.33 km/h)35.8 mph (57.61 km/h)
40 mph (64.37 km/h)40.91 mph (65.84 km/h)
45 mph (72.42 km/h)46.03 mph (74.07 km/h)
50 mph (80.47 km/h)51.14 mph (82.3 km/h)
55 mph (88.51 km/h)56.25 mph (90.53 km/h)
60 mph (96.56 km/h)61.37 mph (98.76 km/h)
65 mph (104.61 km/h)66.48 mph (106.99 km/h)
70 mph (112.65 km/h)71.59 mph (115.22 km/h)
75 mph (120.7 km/h)76.71 mph (123.45 km/h)
80 mph (128.75 km/h)81.82 mph (131.68 km/h)
85 mph (136.79 km/h)86.94 mph (139.91 km/h)
90 mph (144.84 km/h)92.05 mph (148.14 km/h)
95 mph (152.89 km/h)97.16 mph (156.37 km/h)
100 mph (160.93 km/h)102.28 mph (164.6 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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