Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/55r17 vs 235/60r17 Tire Comparison Side By Side
  245/55-17 235/60-17 Difference
Diameter inches (mm) 27.61 (701.3) 28.1 (713.8) 0.49 (12.5) 1.8%
Width inches (mm) 9.65 (245) 9.25 (235) -0.39 (-10) -4.1%
Circum. inches (mm) 86.74 (2203.2) 88.29 (2242.47) 1.55 (39.27) 1.8%
Sidewall Height inches (mm) 5.31 (134.75) 5.55 (141) 0.25 (6.25) 4.6%
Revolutions per mile (km) 730.46 (453.88) 717.67 (445.94) -12.79 (-7.95) -1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.36 mph (32.76 km/h)
25 mph (40.23 km/h)25.45 mph (40.95 km/h)
30 mph (48.28 km/h)30.53 mph (49.14 km/h)
35 mph (56.33 km/h)35.62 mph (57.33 km/h)
40 mph (64.37 km/h)40.71 mph (65.52 km/h)
45 mph (72.42 km/h)45.8 mph (73.71 km/h)
50 mph (80.47 km/h)50.89 mph (81.9 km/h)
55 mph (88.51 km/h)55.98 mph (90.09 km/h)
60 mph (96.56 km/h)61.07 mph (98.28 km/h)
65 mph (104.61 km/h)66.16 mph (106.47 km/h)
70 mph (112.65 km/h)71.25 mph (114.66 km/h)
75 mph (120.7 km/h)76.34 mph (122.85 km/h)
80 mph (128.75 km/h)81.43 mph (131.04 km/h)
85 mph (136.79 km/h)86.52 mph (139.23 km/h)
90 mph (144.84 km/h)91.6 mph (147.42 km/h)
95 mph (152.89 km/h)96.69 mph (155.61 km/h)
100 mph (160.93 km/h)101.78 mph (163.8 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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