Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/90r16 vs 235/45r17 Tire Comparison Side By Side
  135/90-16 235/45-17 Difference
Diameter inches (mm) 25.57 (649.4) 25.33 (643.3) -0.24 (-6.1) -0.9%
Width inches (mm) 5.31 (135) 9.25 (235) 3.94 (100) 74.1%
Circum. inches (mm) 80.32 (2040.15) 79.57 (2020.99) -0.75 (-19.16) -0.9%
Sidewall Height inches (mm) 4.78 (121.5) 4.16 (105.75) -0.62 (-15.75) -13%
Revolutions per mile (km) 788.84 (490.16) 796.32 (494.81) 7.48 (4.65) 0.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.81 mph (31.88 km/h)
25 mph (40.23 km/h)24.77 mph (39.86 km/h)
30 mph (48.28 km/h)29.72 mph (47.83 km/h)
35 mph (56.33 km/h)34.67 mph (55.8 km/h)
40 mph (64.37 km/h)39.62 mph (63.77 km/h)
45 mph (72.42 km/h)44.58 mph (71.74 km/h)
50 mph (80.47 km/h)49.53 mph (79.71 km/h)
55 mph (88.51 km/h)54.48 mph (87.68 km/h)
60 mph (96.56 km/h)59.44 mph (95.65 km/h)
65 mph (104.61 km/h)64.39 mph (103.62 km/h)
70 mph (112.65 km/h)69.34 mph (111.6 km/h)
75 mph (120.7 km/h)74.3 mph (119.57 km/h)
80 mph (128.75 km/h)79.25 mph (127.54 km/h)
85 mph (136.79 km/h)84.2 mph (135.51 km/h)
90 mph (144.84 km/h)89.15 mph (143.48 km/h)
95 mph (152.89 km/h)94.11 mph (151.45 km/h)
100 mph (160.93 km/h)99.06 mph (159.42 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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