Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
70/100r19 vs 60/100r14 Tire Comparison Side By Side
  70/100-19 60/100-14 Difference
Diameter inches (mm) 24.51 (622.6) 18.72 (475.6) -5.79 (-147) -23.6%
Width inches (mm) 2.76 (70) 2.36 (60) -0.39 (-10) -14.3%
Circum. inches (mm) 77.01 (1955.96) 58.82 (1494.14) -18.18 (-461.81) -23.6%
Sidewall Height inches (mm) 2.76 (70) 2.36 (60) -0.39 (-10) -14.3%
Revolutions per mile (km) 822.79 (511.26) 1077.1 (669.28) 254.31 (158.02) 30.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)15.28 mph (24.59 km/h)
25 mph (40.23 km/h)19.1 mph (30.73 km/h)
30 mph (48.28 km/h)22.92 mph (36.88 km/h)
35 mph (56.33 km/h)26.74 mph (43.03 km/h)
40 mph (64.37 km/h)30.56 mph (49.17 km/h)
45 mph (72.42 km/h)34.38 mph (55.32 km/h)
50 mph (80.47 km/h)38.19 mph (61.47 km/h)
55 mph (88.51 km/h)42.01 mph (67.62 km/h)
60 mph (96.56 km/h)45.83 mph (73.76 km/h)
65 mph (104.61 km/h)49.65 mph (79.91 km/h)
70 mph (112.65 km/h)53.47 mph (86.06 km/h)
75 mph (120.7 km/h)57.29 mph (92.2 km/h)
80 mph (128.75 km/h)61.11 mph (98.35 km/h)
85 mph (136.79 km/h)64.93 mph (104.5 km/h)
90 mph (144.84 km/h)68.75 mph (110.64 km/h)
95 mph (152.89 km/h)72.57 mph (116.79 km/h)
100 mph (160.93 km/h)76.39 mph (122.94 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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