Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/35r17 vs 225/25r17 Tire Comparison Side By Side
  225/35-17 225/25-17 Difference
Diameter inches (mm) 23.2 (589.3) 21.43 (544.3) -1.77 (-45) -7.6%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 72.89 (1851.34) 67.32 (1709.97) -5.57 (-141.37) -7.6%
Sidewall Height inches (mm) 3.1 (78.75) 2.21 (56.25) -0.89 (-22.5) -28.6%
Revolutions per mile (km) 869.29 (540.15) 941.15 (584.8) 71.87 (44.66) 8.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.47 mph (29.73 km/h)
25 mph (40.23 km/h)23.09 mph (37.16 km/h)
30 mph (48.28 km/h)27.71 mph (44.59 km/h)
35 mph (56.33 km/h)32.33 mph (52.03 km/h)
40 mph (64.37 km/h)36.95 mph (59.46 km/h)
45 mph (72.42 km/h)41.56 mph (66.89 km/h)
50 mph (80.47 km/h)46.18 mph (74.32 km/h)
55 mph (88.51 km/h)50.8 mph (81.75 km/h)
60 mph (96.56 km/h)55.42 mph (89.19 km/h)
65 mph (104.61 km/h)60.04 mph (96.62 km/h)
70 mph (112.65 km/h)64.65 mph (104.05 km/h)
75 mph (120.7 km/h)69.27 mph (111.48 km/h)
80 mph (128.75 km/h)73.89 mph (118.92 km/h)
85 mph (136.79 km/h)78.51 mph (126.35 km/h)
90 mph (144.84 km/h)83.13 mph (133.78 km/h)
95 mph (152.89 km/h)87.75 mph (141.21 km/h)
100 mph (160.93 km/h)92.36 mph (148.65 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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