Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
120/70r10 vs 130/90r10 Tire Comparison Side By Side
  120/70-10 130/90-10 Difference
Diameter inches (mm) 16.61 (422) 19.21 (488) 2.6 (66) 15.6%
Width inches (mm) 4.72 (120) 5.12 (130) 0.39 (10) 8.3%
Circum. inches (mm) 52.19 (1325.75) 60.36 (1533.1) 8.16 (207.35) 15.6%
Sidewall Height inches (mm) 3.31 (84) 4.61 (117) 1.3 (33) 39.3%
Revolutions per mile (km) 1213.91 (754.29) 1049.73 (652.27) -164.18 (-102.01) -13.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.13 mph (37.22 km/h)
25 mph (40.23 km/h)28.91 mph (46.53 km/h)
30 mph (48.28 km/h)34.69 mph (55.83 km/h)
35 mph (56.33 km/h)40.47 mph (65.14 km/h)
40 mph (64.37 km/h)46.26 mph (74.44 km/h)
45 mph (72.42 km/h)52.04 mph (83.75 km/h)
50 mph (80.47 km/h)57.82 mph (93.05 km/h)
55 mph (88.51 km/h)63.6 mph (102.36 km/h)
60 mph (96.56 km/h)69.38 mph (111.66 km/h)
65 mph (104.61 km/h)75.17 mph (120.97 km/h)
70 mph (112.65 km/h)80.95 mph (130.27 km/h)
75 mph (120.7 km/h)86.73 mph (139.58 km/h)
80 mph (128.75 km/h)92.51 mph (148.88 km/h)
85 mph (136.79 km/h)98.29 mph (158.19 km/h)
90 mph (144.84 km/h)104.08 mph (167.49 km/h)
95 mph (152.89 km/h)109.86 mph (176.8 km/h)
100 mph (160.93 km/h)115.64 mph (186.1 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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