Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/60r17 vs 225/65r17 Tire Comparison Side By Side
  235/60-17 225/65-17 Difference
Diameter inches (mm) 28.1 (713.8) 28.52 (724.3) 0.41 (10.5) 1.5%
Width inches (mm) 9.25 (235) 8.86 (225) -0.39 (-10) -4.3%
Circum. inches (mm) 88.29 (2242.47) 89.58 (2275.46) 1.3 (32.99) 1.5%
Sidewall Height inches (mm) 5.55 (141) 5.76 (146.25) 0.21 (5.25) 3.7%
Revolutions per mile (km) 717.67 (445.94) 707.26 (439.47) -10.4 (-6.46) -1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.29 mph (32.66 km/h)
25 mph (40.23 km/h)25.37 mph (40.83 km/h)
30 mph (48.28 km/h)30.44 mph (48.99 km/h)
35 mph (56.33 km/h)35.51 mph (57.16 km/h)
40 mph (64.37 km/h)40.59 mph (65.32 km/h)
45 mph (72.42 km/h)45.66 mph (73.49 km/h)
50 mph (80.47 km/h)50.74 mph (81.65 km/h)
55 mph (88.51 km/h)55.81 mph (89.82 km/h)
60 mph (96.56 km/h)60.88 mph (97.98 km/h)
65 mph (104.61 km/h)65.96 mph (106.15 km/h)
70 mph (112.65 km/h)71.03 mph (114.31 km/h)
75 mph (120.7 km/h)76.1 mph (122.48 km/h)
80 mph (128.75 km/h)81.18 mph (130.64 km/h)
85 mph (136.79 km/h)86.25 mph (138.81 km/h)
90 mph (144.84 km/h)91.32 mph (146.97 km/h)
95 mph (152.89 km/h)96.4 mph (155.14 km/h)
100 mph (160.93 km/h)101.47 mph (163.3 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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