Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/75r14 vs 195/85r14 Tire Comparison Side By Side
  175/75-14 195/85-14 Difference
Diameter inches (mm) 24.33 (618.1) 27.05 (687.1) 2.72 (69) 11.2%
Width inches (mm) 6.89 (175) 7.68 (195) 0.79 (20) 11.4%
Circum. inches (mm) 76.45 (1941.82) 84.98 (2158.59) 8.53 (216.77) 11.2%
Sidewall Height inches (mm) 5.17 (131.25) 6.53 (165.75) 1.36 (34.5) 26.3%
Revolutions per mile (km) 828.78 (514.98) 745.55 (463.26) -83.23 (-51.72) -10%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.23 mph (35.78 km/h)
25 mph (40.23 km/h)27.79 mph (44.73 km/h)
30 mph (48.28 km/h)33.35 mph (53.67 km/h)
35 mph (56.33 km/h)38.91 mph (62.62 km/h)
40 mph (64.37 km/h)44.47 mph (71.56 km/h)
45 mph (72.42 km/h)50.02 mph (80.51 km/h)
50 mph (80.47 km/h)55.58 mph (89.45 km/h)
55 mph (88.51 km/h)61.14 mph (98.4 km/h)
60 mph (96.56 km/h)66.7 mph (107.34 km/h)
65 mph (104.61 km/h)72.26 mph (116.29 km/h)
70 mph (112.65 km/h)77.81 mph (125.23 km/h)
75 mph (120.7 km/h)83.37 mph (134.18 km/h)
80 mph (128.75 km/h)88.93 mph (143.12 km/h)
85 mph (136.79 km/h)94.49 mph (152.07 km/h)
90 mph (144.84 km/h)100.05 mph (161.01 km/h)
95 mph (152.89 km/h)105.61 mph (169.96 km/h)
100 mph (160.93 km/h)111.16 mph (178.9 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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