Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r19.5 vs 245/75r16 Tire Comparison Side By Side
  265/70-19.5 245/75-16 Difference
Diameter inches (mm) 34.11 (866.3) 30.47 (773.9) -3.64 (-92.4) -10.7%
Width inches (mm) 10.43 (265) 9.65 (245) -0.79 (-20) -7.5%
Circum. inches (mm) 107.15 (2721.56) 95.72 (2431.28) -11.43 (-290.28) -10.7%
Sidewall Height inches (mm) 7.3 (185.5) 7.23 (183.75) -0.07 (-1.75) -0.9%
Revolutions per mile (km) 591.33 (367.44) 661.93 (411.31) 70.6 (43.87) 11.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.87 mph (28.75 km/h)
25 mph (40.23 km/h)22.33 mph (35.94 km/h)
30 mph (48.28 km/h)26.8 mph (43.13 km/h)
35 mph (56.33 km/h)31.27 mph (50.32 km/h)
40 mph (64.37 km/h)35.73 mph (57.51 km/h)
45 mph (72.42 km/h)40.2 mph (64.7 km/h)
50 mph (80.47 km/h)44.67 mph (71.88 km/h)
55 mph (88.51 km/h)49.13 mph (79.07 km/h)
60 mph (96.56 km/h)53.6 mph (86.26 km/h)
65 mph (104.61 km/h)58.07 mph (93.45 km/h)
70 mph (112.65 km/h)62.53 mph (100.64 km/h)
75 mph (120.7 km/h)67 mph (107.83 km/h)
80 mph (128.75 km/h)71.47 mph (115.02 km/h)
85 mph (136.79 km/h)75.93 mph (122.2 km/h)
90 mph (144.84 km/h)80.4 mph (129.39 km/h)
95 mph (152.89 km/h)84.87 mph (136.58 km/h)
100 mph (160.93 km/h)89.33 mph (143.77 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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