Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/65r17 vs 235/55r17 Tire Comparison Side By Side
  225/65-17 235/55-17 Difference
Diameter inches (mm) 28.52 (724.3) 27.18 (690.3) -1.34 (-34) -4.7%
Width inches (mm) 8.86 (225) 9.25 (235) 0.39 (10) 4.4%
Circum. inches (mm) 89.58 (2275.46) 85.38 (2168.64) -4.21 (-106.81) -4.7%
Sidewall Height inches (mm) 5.76 (146.25) 5.09 (129.25) -0.67 (-17) -11.6%
Revolutions per mile (km) 707.26 (439.47) 742.1 (461.12) 34.84 (21.65) 4.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.06 mph (30.68 km/h)
25 mph (40.23 km/h)23.83 mph (38.35 km/h)
30 mph (48.28 km/h)28.59 mph (46.01 km/h)
35 mph (56.33 km/h)33.36 mph (53.68 km/h)
40 mph (64.37 km/h)38.12 mph (61.35 km/h)
45 mph (72.42 km/h)42.89 mph (69.02 km/h)
50 mph (80.47 km/h)47.65 mph (76.69 km/h)
55 mph (88.51 km/h)52.42 mph (84.36 km/h)
60 mph (96.56 km/h)57.18 mph (92.03 km/h)
65 mph (104.61 km/h)61.95 mph (99.7 km/h)
70 mph (112.65 km/h)66.71 mph (107.37 km/h)
75 mph (120.7 km/h)71.48 mph (115.04 km/h)
80 mph (128.75 km/h)76.24 mph (122.7 km/h)
85 mph (136.79 km/h)81.01 mph (130.37 km/h)
90 mph (144.84 km/h)85.78 mph (138.04 km/h)
95 mph (152.89 km/h)90.54 mph (145.71 km/h)
100 mph (160.93 km/h)95.31 mph (153.38 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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