Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/75r16 vs 225/75r16 Tire Comparison Side By Side
  195/75-16 225/75-16 Difference
Diameter inches (mm) 27.52 (698.9) 29.29 (743.9) 1.77 (45) 6.4%
Width inches (mm) 7.68 (195) 8.86 (225) 1.18 (30) 15.4%
Circum. inches (mm) 86.44 (2195.66) 92.01 (2337.03) 5.57 (141.37) 6.4%
Sidewall Height inches (mm) 5.76 (146.25) 6.64 (168.75) 0.89 (22.5) 15.4%
Revolutions per mile (km) 732.97 (455.44) 688.63 (427.89) -44.34 (-27.55) -6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.29 mph (34.26 km/h)
25 mph (40.23 km/h)26.61 mph (42.82 km/h)
30 mph (48.28 km/h)31.93 mph (51.39 km/h)
35 mph (56.33 km/h)37.25 mph (59.95 km/h)
40 mph (64.37 km/h)42.58 mph (68.52 km/h)
45 mph (72.42 km/h)47.9 mph (77.08 km/h)
50 mph (80.47 km/h)53.22 mph (85.65 km/h)
55 mph (88.51 km/h)58.54 mph (94.21 km/h)
60 mph (96.56 km/h)63.86 mph (102.78 km/h)
65 mph (104.61 km/h)69.19 mph (111.34 km/h)
70 mph (112.65 km/h)74.51 mph (119.91 km/h)
75 mph (120.7 km/h)79.83 mph (128.47 km/h)
80 mph (128.75 km/h)85.15 mph (137.04 km/h)
85 mph (136.79 km/h)90.47 mph (145.6 km/h)
90 mph (144.84 km/h)95.79 mph (154.17 km/h)
95 mph (152.89 km/h)101.12 mph (162.73 km/h)
100 mph (160.93 km/h)106.44 mph (171.3 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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