Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
145/60r13 vs 195/45r14 Tire Comparison Side By Side
  145/60-13 195/45-14 Difference
Diameter inches (mm) 19.85 (504.2) 20.91 (531.1) 1.06 (26.9) 5.3%
Width inches (mm) 5.71 (145) 7.68 (195) 1.97 (50) 34.5%
Circum. inches (mm) 62.36 (1583.99) 65.69 (1668.5) 3.33 (84.51) 5.3%
Sidewall Height inches (mm) 3.43 (87) 3.45 (87.75) 0.03 (0.75) 0.9%
Revolutions per mile (km) 1016.01 (631.32) 964.55 (599.34) -51.46 (-31.98) -5.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.07 mph (33.9 km/h)
25 mph (40.23 km/h)26.33 mph (42.38 km/h)
30 mph (48.28 km/h)31.6 mph (50.86 km/h)
35 mph (56.33 km/h)36.87 mph (59.33 km/h)
40 mph (64.37 km/h)42.13 mph (67.81 km/h)
45 mph (72.42 km/h)47.4 mph (76.28 km/h)
50 mph (80.47 km/h)52.67 mph (84.76 km/h)
55 mph (88.51 km/h)57.93 mph (93.24 km/h)
60 mph (96.56 km/h)63.2 mph (101.71 km/h)
65 mph (104.61 km/h)68.47 mph (110.19 km/h)
70 mph (112.65 km/h)73.73 mph (118.66 km/h)
75 mph (120.7 km/h)79 mph (127.14 km/h)
80 mph (128.75 km/h)84.27 mph (135.62 km/h)
85 mph (136.79 km/h)89.53 mph (144.09 km/h)
90 mph (144.84 km/h)94.8 mph (152.57 km/h)
95 mph (152.89 km/h)100.07 mph (161.04 km/h)
100 mph (160.93 km/h)105.34 mph (169.52 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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