Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
120/90r19 vs 130/90r18 Tire Comparison Side By Side
  120/90-19 130/90-18 Difference
Diameter inches (mm) 27.5 (698.6) 27.21 (691.2) -0.29 (-7.4) -1.1%
Width inches (mm) 4.72 (120) 5.12 (130) 0.39 (10) 8.3%
Circum. inches (mm) 86.41 (2194.72) 85.49 (2171.47) -0.92 (-23.25) -1.1%
Sidewall Height inches (mm) 4.25 (108) 4.61 (117) 0.35 (9) 8.3%
Revolutions per mile (km) 733.28 (455.64) 741.13 (460.52) 7.85 (4.88) 1.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.79 mph (31.85 km/h)
25 mph (40.23 km/h)24.74 mph (39.81 km/h)
30 mph (48.28 km/h)29.68 mph (47.77 km/h)
35 mph (56.33 km/h)34.63 mph (55.73 km/h)
40 mph (64.37 km/h)39.58 mph (63.69 km/h)
45 mph (72.42 km/h)44.52 mph (71.65 km/h)
50 mph (80.47 km/h)49.47 mph (79.61 km/h)
55 mph (88.51 km/h)54.42 mph (87.58 km/h)
60 mph (96.56 km/h)59.36 mph (95.54 km/h)
65 mph (104.61 km/h)64.31 mph (103.5 km/h)
70 mph (112.65 km/h)69.26 mph (111.46 km/h)
75 mph (120.7 km/h)74.21 mph (119.42 km/h)
80 mph (128.75 km/h)79.15 mph (127.38 km/h)
85 mph (136.79 km/h)84.1 mph (135.35 km/h)
90 mph (144.84 km/h)89.05 mph (143.31 km/h)
95 mph (152.89 km/h)93.99 mph (151.27 km/h)
100 mph (160.93 km/h)98.94 mph (159.23 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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