Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/60r14 vs 225/45r16 Tire Comparison Side By Side
  195/60-14 225/45-16 Difference
Diameter inches (mm) 23.21 (589.6) 23.97 (608.9) 0.76 (19.3) 3.3%
Width inches (mm) 7.68 (195) 8.86 (225) 1.18 (30) 15.4%
Circum. inches (mm) 72.92 (1852.28) 75.31 (1912.92) 2.39 (60.63) 3.3%
Sidewall Height inches (mm) 4.61 (117) 3.99 (101.25) -0.62 (-15.75) -13.5%
Revolutions per mile (km) 868.84 (539.87) 841.3 (522.76) -27.54 (-17.11) -3.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.65 mph (33.24 km/h)
25 mph (40.23 km/h)25.82 mph (41.55 km/h)
30 mph (48.28 km/h)30.98 mph (49.86 km/h)
35 mph (56.33 km/h)36.15 mph (58.17 km/h)
40 mph (64.37 km/h)41.31 mph (66.48 km/h)
45 mph (72.42 km/h)46.47 mph (74.79 km/h)
50 mph (80.47 km/h)51.64 mph (83.1 km/h)
55 mph (88.51 km/h)56.8 mph (91.41 km/h)
60 mph (96.56 km/h)61.96 mph (99.72 km/h)
65 mph (104.61 km/h)67.13 mph (108.03 km/h)
70 mph (112.65 km/h)72.29 mph (116.34 km/h)
75 mph (120.7 km/h)77.46 mph (124.65 km/h)
80 mph (128.75 km/h)82.62 mph (132.96 km/h)
85 mph (136.79 km/h)87.78 mph (141.27 km/h)
90 mph (144.84 km/h)92.95 mph (149.58 km/h)
95 mph (152.89 km/h)98.11 mph (157.89 km/h)
100 mph (160.93 km/h)103.27 mph (166.2 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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