Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/60r16 vs 245/70r16 Tire Comparison Side By Side
  255/60-16 245/70-16 Difference
Diameter inches (mm) 28.05 (712.4) 29.5 (749.4) 1.46 (37) 5.2%
Width inches (mm) 10.04 (255) 9.65 (245) -0.39 (-10) -3.9%
Circum. inches (mm) 88.11 (2238.07) 92.69 (2354.31) 4.58 (116.24) 5.2%
Sidewall Height inches (mm) 6.02 (153) 6.75 (171.5) 0.73 (18.5) 12.1%
Revolutions per mile (km) 719.08 (446.81) 683.57 (424.75) -35.5 (-22.06) -4.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.04 mph (33.86 km/h)
25 mph (40.23 km/h)26.3 mph (42.32 km/h)
30 mph (48.28 km/h)31.56 mph (50.79 km/h)
35 mph (56.33 km/h)36.82 mph (59.25 km/h)
40 mph (64.37 km/h)42.08 mph (67.72 km/h)
45 mph (72.42 km/h)47.34 mph (76.18 km/h)
50 mph (80.47 km/h)52.6 mph (84.65 km/h)
55 mph (88.51 km/h)57.86 mph (93.11 km/h)
60 mph (96.56 km/h)63.12 mph (101.58 km/h)
65 mph (104.61 km/h)68.38 mph (110.04 km/h)
70 mph (112.65 km/h)73.64 mph (118.51 km/h)
75 mph (120.7 km/h)78.9 mph (126.97 km/h)
80 mph (128.75 km/h)84.15 mph (135.43 km/h)
85 mph (136.79 km/h)89.41 mph (143.9 km/h)
90 mph (144.84 km/h)94.67 mph (152.36 km/h)
95 mph (152.89 km/h)99.93 mph (160.83 km/h)
100 mph (160.93 km/h)105.19 mph (169.29 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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