Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/45r15 vs 295/50r15 Tire Comparison Side By Side
  255/45-15 295/50-15 Difference
Diameter inches (mm) 24.04 (610.5) 26.61 (676) 2.58 (65.5) 10.7%
Width inches (mm) 10.04 (255) 11.61 (295) 1.57 (40) 15.7%
Circum. inches (mm) 75.51 (1917.94) 83.61 (2123.72) 8.1 (205.77) 10.7%
Sidewall Height inches (mm) 4.52 (114.75) 5.81 (147.5) 1.29 (32.75) 28.5%
Revolutions per mile (km) 839.1 (521.39) 757.8 (470.87) -81.3 (-50.52) -9.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.15 mph (35.64 km/h)
25 mph (40.23 km/h)27.68 mph (44.55 km/h)
30 mph (48.28 km/h)33.22 mph (53.46 km/h)
35 mph (56.33 km/h)38.76 mph (62.37 km/h)
40 mph (64.37 km/h)44.29 mph (71.28 km/h)
45 mph (72.42 km/h)49.83 mph (80.19 km/h)
50 mph (80.47 km/h)55.36 mph (89.1 km/h)
55 mph (88.51 km/h)60.9 mph (98.01 km/h)
60 mph (96.56 km/h)66.44 mph (106.92 km/h)
65 mph (104.61 km/h)71.97 mph (115.83 km/h)
70 mph (112.65 km/h)77.51 mph (124.74 km/h)
75 mph (120.7 km/h)83.05 mph (133.65 km/h)
80 mph (128.75 km/h)88.58 mph (142.56 km/h)
85 mph (136.79 km/h)94.12 mph (151.47 km/h)
90 mph (144.84 km/h)99.66 mph (160.38 km/h)
95 mph (152.89 km/h)105.19 mph (169.29 km/h)
100 mph (160.93 km/h)110.73 mph (178.2 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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