Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
90/70r10 vs 130/70r10 Tire Comparison Side By Side
  90/70-10 130/70-10 Difference
Diameter inches (mm) 14.96 (380) 17.17 (436) 2.2 (56) 14.7%
Width inches (mm) 3.54 (90) 5.12 (130) 1.57 (40) 44.4%
Circum. inches (mm) 47 (1193.81) 53.93 (1369.73) 6.93 (175.93) 14.7%
Sidewall Height inches (mm) 2.48 (63) 3.58 (91) 1.1 (28) 44.4%
Revolutions per mile (km) 1348.08 (837.66) 1174.93 (730.07) -173.15 (-107.59) -12.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.95 mph (36.93 km/h)
25 mph (40.23 km/h)28.68 mph (46.16 km/h)
30 mph (48.28 km/h)34.42 mph (55.4 km/h)
35 mph (56.33 km/h)40.16 mph (64.63 km/h)
40 mph (64.37 km/h)45.89 mph (73.86 km/h)
45 mph (72.42 km/h)51.63 mph (83.09 km/h)
50 mph (80.47 km/h)57.37 mph (92.33 km/h)
55 mph (88.51 km/h)63.11 mph (101.56 km/h)
60 mph (96.56 km/h)68.84 mph (110.79 km/h)
65 mph (104.61 km/h)74.58 mph (120.02 km/h)
70 mph (112.65 km/h)80.32 mph (129.26 km/h)
75 mph (120.7 km/h)86.05 mph (138.49 km/h)
80 mph (128.75 km/h)91.79 mph (147.72 km/h)
85 mph (136.79 km/h)97.53 mph (156.95 km/h)
90 mph (144.84 km/h)103.26 mph (166.19 km/h)
95 mph (152.89 km/h)109 mph (175.42 km/h)
100 mph (160.93 km/h)114.74 mph (184.65 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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