Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
70/90r19 vs 70/100r19 Tire Comparison Side By Side
  70/90-19 70/100-19 Difference
Diameter inches (mm) 23.96 (608.6) 24.51 (622.6) 0.55 (14) 2.3%
Width inches (mm) 2.76 (70) 2.76 (70) 0 (0) 0%
Circum. inches (mm) 75.27 (1911.97) 77.01 (1955.96) 1.73 (43.98) 2.3%
Sidewall Height inches (mm) 2.48 (63) 2.76 (70) 0.28 (7) 11.1%
Revolutions per mile (km) 841.72 (523.02) 822.79 (511.26) -18.93 (-11.76) -2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.46 mph (32.93 km/h)
25 mph (40.23 km/h)25.58 mph (41.16 km/h)
30 mph (48.28 km/h)30.69 mph (49.39 km/h)
35 mph (56.33 km/h)35.81 mph (57.62 km/h)
40 mph (64.37 km/h)40.92 mph (65.85 km/h)
45 mph (72.42 km/h)46.04 mph (74.09 km/h)
50 mph (80.47 km/h)51.15 mph (82.32 km/h)
55 mph (88.51 km/h)56.27 mph (90.55 km/h)
60 mph (96.56 km/h)61.38 mph (98.78 km/h)
65 mph (104.61 km/h)66.5 mph (107.01 km/h)
70 mph (112.65 km/h)71.61 mph (115.25 km/h)
75 mph (120.7 km/h)76.73 mph (123.48 km/h)
80 mph (128.75 km/h)81.84 mph (131.71 km/h)
85 mph (136.79 km/h)86.96 mph (139.94 km/h)
90 mph (144.84 km/h)92.07 mph (148.17 km/h)
95 mph (152.89 km/h)97.19 mph (156.4 km/h)
100 mph (160.93 km/h)102.3 mph (164.64 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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