Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/45r17 vs 225/35r17 Tire Comparison Side By Side
  225/45-17 225/35-17 Difference
Diameter inches (mm) 24.97 (634.3) 23.2 (589.3) -1.77 (-45) -7.1%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 78.45 (1992.71) 72.89 (1851.34) -5.57 (-141.37) -7.1%
Sidewall Height inches (mm) 3.99 (101.25) 3.1 (78.75) -0.89 (-22.5) -22.2%
Revolutions per mile (km) 807.61 (501.83) 869.29 (540.15) 61.67 (38.32) 7.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.58 mph (29.9 km/h)
25 mph (40.23 km/h)23.23 mph (37.38 km/h)
30 mph (48.28 km/h)27.87 mph (44.86 km/h)
35 mph (56.33 km/h)32.52 mph (52.33 km/h)
40 mph (64.37 km/h)37.16 mph (59.81 km/h)
45 mph (72.42 km/h)41.81 mph (67.28 km/h)
50 mph (80.47 km/h)46.45 mph (74.76 km/h)
55 mph (88.51 km/h)51.1 mph (82.23 km/h)
60 mph (96.56 km/h)55.74 mph (89.71 km/h)
65 mph (104.61 km/h)60.39 mph (97.19 km/h)
70 mph (112.65 km/h)65.03 mph (104.66 km/h)
75 mph (120.7 km/h)69.68 mph (112.14 km/h)
80 mph (128.75 km/h)74.32 mph (119.61 km/h)
85 mph (136.79 km/h)78.97 mph (127.09 km/h)
90 mph (144.84 km/h)83.62 mph (134.57 km/h)
95 mph (152.89 km/h)88.26 mph (142.04 km/h)
100 mph (160.93 km/h)92.91 mph (149.52 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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