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 110/90r18 Tire Comparison Side By Side
  70/100-19 110/90-18 Difference
Diameter inches (mm) 24.51 (622.6) 25.8 (655.2) 1.28 (32.6) 5.2%
Width inches (mm) 2.76 (70) 4.33 (110) 1.57 (40) 57.1%
Circum. inches (mm) 77.01 (1955.96) 81.04 (2058.37) 4.03 (102.42) 5.2%
Sidewall Height inches (mm) 2.76 (70) 3.9 (99) 1.14 (29) 41.4%
Revolutions per mile (km) 822.79 (511.26) 781.85 (485.82) -40.94 (-25.44) -5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.05 mph (33.87 km/h)
25 mph (40.23 km/h)26.31 mph (42.34 km/h)
30 mph (48.28 km/h)31.57 mph (50.81 km/h)
35 mph (56.33 km/h)36.83 mph (59.28 km/h)
40 mph (64.37 km/h)42.09 mph (67.74 km/h)
45 mph (72.42 km/h)47.36 mph (76.21 km/h)
50 mph (80.47 km/h)52.62 mph (84.68 km/h)
55 mph (88.51 km/h)57.88 mph (93.15 km/h)
60 mph (96.56 km/h)63.14 mph (101.62 km/h)
65 mph (104.61 km/h)68.4 mph (110.08 km/h)
70 mph (112.65 km/h)73.67 mph (118.55 km/h)
75 mph (120.7 km/h)78.93 mph (127.02 km/h)
80 mph (128.75 km/h)84.19 mph (135.49 km/h)
85 mph (136.79 km/h)89.45 mph (143.96 km/h)
90 mph (144.84 km/h)94.71 mph (152.43 km/h)
95 mph (152.89 km/h)99.97 mph (160.89 km/h)
100 mph (160.93 km/h)105.24 mph (169.36 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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