Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/55r16 vs 195/55r16 Tire Comparison Side By Side
  215/55-16 195/55-16 Difference
Diameter inches (mm) 25.31 (642.9) 24.44 (620.9) -0.87 (-22) -3.4%
Width inches (mm) 8.46 (215) 7.68 (195) -0.79 (-20) -9.3%
Circum. inches (mm) 79.52 (2019.73) 76.8 (1950.61) -2.72 (-69.12) -3.4%
Sidewall Height inches (mm) 4.66 (118.25) 4.22 (107.25) -0.43 (-11) -9.3%
Revolutions per mile (km) 796.81 (495.11) 825.04 (512.66) 28.23 (17.54) 3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.32 mph (31.09 km/h)
25 mph (40.23 km/h)24.14 mph (38.86 km/h)
30 mph (48.28 km/h)28.97 mph (46.63 km/h)
35 mph (56.33 km/h)33.8 mph (54.4 km/h)
40 mph (64.37 km/h)38.63 mph (62.17 km/h)
45 mph (72.42 km/h)43.46 mph (69.94 km/h)
50 mph (80.47 km/h)48.29 mph (77.71 km/h)
55 mph (88.51 km/h)53.12 mph (85.49 km/h)
60 mph (96.56 km/h)57.95 mph (93.26 km/h)
65 mph (104.61 km/h)62.78 mph (101.03 km/h)
70 mph (112.65 km/h)67.6 mph (108.8 km/h)
75 mph (120.7 km/h)72.43 mph (116.57 km/h)
80 mph (128.75 km/h)77.26 mph (124.34 km/h)
85 mph (136.79 km/h)82.09 mph (132.11 km/h)
90 mph (144.84 km/h)86.92 mph (139.88 km/h)
95 mph (152.89 km/h)91.75 mph (147.66 km/h)
100 mph (160.93 km/h)96.58 mph (155.43 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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