Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
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295/45r19 vs 235/60r18 Tire Comparison Side By Side
  295/45-19 235/60-18 Difference
Diameter inches (mm) 29.45 (748.1) 29.1 (739.2) -0.35 (-8.9) -1.2%
Width inches (mm) 11.61 (295) 9.25 (235) -2.36 (-60) -20.3%
Circum. inches (mm) 92.53 (2350.23) 91.43 (2322.27) -1.1 (-27.96) -1.2%
Sidewall Height inches (mm) 5.23 (132.75) 5.55 (141) 0.32 (8.25) 6.2%
Revolutions per mile (km) 684.76 (425.49) 693.01 (430.61) 8.24 (5.12) 1.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.76 mph (31.8 km/h)
25 mph (40.23 km/h)24.7 mph (39.76 km/h)
30 mph (48.28 km/h)29.64 mph (47.71 km/h)
35 mph (56.33 km/h)34.58 mph (55.66 km/h)
40 mph (64.37 km/h)39.52 mph (63.61 km/h)
45 mph (72.42 km/h)44.46 mph (71.56 km/h)
50 mph (80.47 km/h)49.41 mph (79.51 km/h)
55 mph (88.51 km/h)54.35 mph (87.46 km/h)
60 mph (96.56 km/h)59.29 mph (95.41 km/h)
65 mph (104.61 km/h)64.23 mph (103.36 km/h)
70 mph (112.65 km/h)69.17 mph (111.31 km/h)
75 mph (120.7 km/h)74.11 mph (119.27 km/h)
80 mph (128.75 km/h)79.05 mph (127.22 km/h)
85 mph (136.79 km/h)83.99 mph (135.17 km/h)
90 mph (144.84 km/h)88.93 mph (143.12 km/h)
95 mph (152.89 km/h)93.87 mph (151.07 km/h)
100 mph (160.93 km/h)98.81 mph (159.02 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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