Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/50r14 vs 245/50r14 Tire Comparison Side By Side
  205/50-14 245/50-14 Difference
Diameter inches (mm) 22.07 (560.6) 23.65 (600.6) 1.57 (40) 7.1%
Width inches (mm) 8.07 (205) 9.65 (245) 1.57 (40) 19.5%
Circum. inches (mm) 69.34 (1761.18) 74.29 (1886.84) 4.95 (125.66) 7.1%
Sidewall Height inches (mm) 4.04 (102.5) 4.82 (122.5) 0.79 (20) 19.5%
Revolutions per mile (km) 913.79 (567.8) 852.93 (529.99) -60.86 (-37.82) -6.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.43 mph (34.48 km/h)
25 mph (40.23 km/h)26.78 mph (43.1 km/h)
30 mph (48.28 km/h)32.14 mph (51.73 km/h)
35 mph (56.33 km/h)37.5 mph (60.35 km/h)
40 mph (64.37 km/h)42.85 mph (68.97 km/h)
45 mph (72.42 km/h)48.21 mph (77.59 km/h)
50 mph (80.47 km/h)53.57 mph (86.21 km/h)
55 mph (88.51 km/h)58.92 mph (94.83 km/h)
60 mph (96.56 km/h)64.28 mph (103.45 km/h)
65 mph (104.61 km/h)69.64 mph (112.07 km/h)
70 mph (112.65 km/h)74.99 mph (120.69 km/h)
75 mph (120.7 km/h)80.35 mph (129.31 km/h)
80 mph (128.75 km/h)85.71 mph (137.93 km/h)
85 mph (136.79 km/h)91.06 mph (146.56 km/h)
90 mph (144.84 km/h)96.42 mph (155.18 km/h)
95 mph (152.89 km/h)101.78 mph (163.8 km/h)
100 mph (160.93 km/h)107.14 mph (172.42 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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