Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/45r14 vs 195/65r14 Tire Comparison Side By Side
  195/45-14 195/65-14 Difference
Diameter inches (mm) 20.91 (531.1) 23.98 (609.1) 3.07 (78) 14.7%
Width inches (mm) 7.68 (195) 7.68 (195) 0 (0) 0%
Circum. inches (mm) 65.69 (1668.5) 75.34 (1913.54) 9.65 (245.04) 14.7%
Sidewall Height inches (mm) 3.45 (87.75) 4.99 (126.75) 1.54 (39) 44.4%
Revolutions per mile (km) 964.55 (599.34) 841.03 (522.59) -123.52 (-76.75) -12.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.94 mph (36.91 km/h)
25 mph (40.23 km/h)28.67 mph (46.14 km/h)
30 mph (48.28 km/h)34.41 mph (55.37 km/h)
35 mph (56.33 km/h)40.14 mph (64.6 km/h)
40 mph (64.37 km/h)45.87 mph (73.83 km/h)
45 mph (72.42 km/h)51.61 mph (83.06 km/h)
50 mph (80.47 km/h)57.34 mph (92.29 km/h)
55 mph (88.51 km/h)63.08 mph (101.51 km/h)
60 mph (96.56 km/h)68.81 mph (110.74 km/h)
65 mph (104.61 km/h)74.55 mph (119.97 km/h)
70 mph (112.65 km/h)80.28 mph (129.2 km/h)
75 mph (120.7 km/h)86.01 mph (138.43 km/h)
80 mph (128.75 km/h)91.75 mph (147.66 km/h)
85 mph (136.79 km/h)97.48 mph (156.88 km/h)
90 mph (144.84 km/h)103.22 mph (166.11 km/h)
95 mph (152.89 km/h)108.95 mph (175.34 km/h)
100 mph (160.93 km/h)114.69 mph (184.57 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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