Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/70r17 vs 225/45r17 Tire Comparison Side By Side
  135/70-17 225/45-17 Difference
Diameter inches (mm) 24.44 (620.8) 24.97 (634.3) 0.53 (13.5) 2.2%
Width inches (mm) 5.31 (135) 8.86 (225) 3.54 (90) 66.7%
Circum. inches (mm) 76.78 (1950.3) 78.45 (1992.71) 1.67 (42.41) 2.2%
Sidewall Height inches (mm) 3.72 (94.5) 3.99 (101.25) 0.27 (6.75) 7.1%
Revolutions per mile (km) 825.18 (512.74) 807.61 (501.83) -17.56 (-10.91) -2.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.43 mph (32.89 km/h)
25 mph (40.23 km/h)25.54 mph (41.11 km/h)
30 mph (48.28 km/h)30.65 mph (49.33 km/h)
35 mph (56.33 km/h)35.76 mph (57.55 km/h)
40 mph (64.37 km/h)40.87 mph (65.77 km/h)
45 mph (72.42 km/h)45.98 mph (74 km/h)
50 mph (80.47 km/h)51.09 mph (82.22 km/h)
55 mph (88.51 km/h)56.2 mph (90.44 km/h)
60 mph (96.56 km/h)61.3 mph (98.66 km/h)
65 mph (104.61 km/h)66.41 mph (106.88 km/h)
70 mph (112.65 km/h)71.52 mph (115.1 km/h)
75 mph (120.7 km/h)76.63 mph (123.33 km/h)
80 mph (128.75 km/h)81.74 mph (131.55 km/h)
85 mph (136.79 km/h)86.85 mph (139.77 km/h)
90 mph (144.84 km/h)91.96 mph (147.99 km/h)
95 mph (152.89 km/h)97.07 mph (156.21 km/h)
100 mph (160.93 km/h)102.17 mph (164.43 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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