Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/45r19 vs 275/45r15 Tire Comparison Side By Side
  295/45-19 275/45-15 Difference
Diameter inches (mm) 29.45 (748.1) 24.74 (628.5) -4.71 (-119.6) -16%
Width inches (mm) 11.61 (295) 10.83 (275) -0.79 (-20) -6.8%
Circum. inches (mm) 92.53 (2350.23) 77.74 (1974.49) -14.79 (-375.73) -16%
Sidewall Height inches (mm) 5.23 (132.75) 4.87 (123.75) -0.35 (-9) -6.8%
Revolutions per mile (km) 684.76 (425.49) 815.07 (506.46) 130.31 (80.97) 19%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)16.8 mph (27.04 km/h)
25 mph (40.23 km/h)21 mph (33.8 km/h)
30 mph (48.28 km/h)25.2 mph (40.56 km/h)
35 mph (56.33 km/h)29.4 mph (47.32 km/h)
40 mph (64.37 km/h)33.61 mph (54.08 km/h)
45 mph (72.42 km/h)37.81 mph (60.84 km/h)
50 mph (80.47 km/h)42.01 mph (67.6 km/h)
55 mph (88.51 km/h)46.21 mph (74.36 km/h)
60 mph (96.56 km/h)50.41 mph (81.12 km/h)
65 mph (104.61 km/h)54.61 mph (87.88 km/h)
70 mph (112.65 km/h)58.81 mph (94.64 km/h)
75 mph (120.7 km/h)63.01 mph (101.4 km/h)
80 mph (128.75 km/h)67.21 mph (108.16 km/h)
85 mph (136.79 km/h)71.41 mph (114.92 km/h)
90 mph (144.84 km/h)75.61 mph (121.69 km/h)
95 mph (152.89 km/h)79.81 mph (128.45 km/h)
100 mph (160.93 km/h)84.01 mph (135.21 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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