Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/60r16 vs 175/70r16 Tire Comparison Side By Side
  175/60-16 175/70-16 Difference
Diameter inches (mm) 24.27 (616.4) 25.65 (651.4) 1.38 (35) 5.7%
Width inches (mm) 6.89 (175) 6.89 (175) 0 (0) 0%
Circum. inches (mm) 76.24 (1936.48) 80.57 (2046.43) 4.33 (109.96) 5.7%
Sidewall Height inches (mm) 4.13 (105) 4.82 (122.5) 0.69 (17.5) 16.7%
Revolutions per mile (km) 831.07 (516.4) 786.41 (488.65) -44.65 (-27.75) -5.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.14 mph (34.01 km/h)
25 mph (40.23 km/h)26.42 mph (42.52 km/h)
30 mph (48.28 km/h)31.7 mph (51.02 km/h)
35 mph (56.33 km/h)36.99 mph (59.53 km/h)
40 mph (64.37 km/h)42.27 mph (68.03 km/h)
45 mph (72.42 km/h)47.56 mph (76.53 km/h)
50 mph (80.47 km/h)52.84 mph (85.04 km/h)
55 mph (88.51 km/h)58.12 mph (93.54 km/h)
60 mph (96.56 km/h)63.41 mph (102.04 km/h)
65 mph (104.61 km/h)68.69 mph (110.55 km/h)
70 mph (112.65 km/h)73.97 mph (119.05 km/h)
75 mph (120.7 km/h)79.26 mph (127.55 km/h)
80 mph (128.75 km/h)84.54 mph (136.06 km/h)
85 mph (136.79 km/h)89.83 mph (144.56 km/h)
90 mph (144.84 km/h)95.11 mph (153.07 km/h)
95 mph (152.89 km/h)100.39 mph (161.57 km/h)
100 mph (160.93 km/h)105.68 mph (170.07 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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