Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
90/90r10 vs 130/70r10 Tire Comparison Side By Side
  90/90-10 130/70-10 Difference
Diameter inches (mm) 16.38 (416) 17.17 (436) 0.79 (20) 4.8%
Width inches (mm) 3.54 (90) 5.12 (130) 1.57 (40) 44.4%
Circum. inches (mm) 51.45 (1306.9) 53.93 (1369.73) 2.47 (62.83) 4.8%
Sidewall Height inches (mm) 3.19 (81) 3.58 (91) 0.39 (10) 12.3%
Revolutions per mile (km) 1231.42 (765.17) 1174.93 (730.07) -56.49 (-35.1) -4.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.96 mph (33.73 km/h)
25 mph (40.23 km/h)26.2 mph (42.17 km/h)
30 mph (48.28 km/h)31.44 mph (50.6 km/h)
35 mph (56.33 km/h)36.68 mph (59.04 km/h)
40 mph (64.37 km/h)41.92 mph (67.47 km/h)
45 mph (72.42 km/h)47.16 mph (75.9 km/h)
50 mph (80.47 km/h)52.4 mph (84.34 km/h)
55 mph (88.51 km/h)57.64 mph (92.77 km/h)
60 mph (96.56 km/h)62.88 mph (101.2 km/h)
65 mph (104.61 km/h)68.13 mph (109.64 km/h)
70 mph (112.65 km/h)73.37 mph (118.07 km/h)
75 mph (120.7 km/h)78.61 mph (126.5 km/h)
80 mph (128.75 km/h)83.85 mph (134.94 km/h)
85 mph (136.79 km/h)89.09 mph (143.37 km/h)
90 mph (144.84 km/h)94.33 mph (151.8 km/h)
95 mph (152.89 km/h)99.57 mph (160.24 km/h)
100 mph (160.93 km/h)104.81 mph (168.67 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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