Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/45r15 vs 205/35r15 Tire Comparison Side By Side
  205/45-15 205/35-15 Difference
Diameter inches (mm) 22.26 (565.5) 20.65 (524.5) -1.61 (-41) -7.3%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 69.94 (1776.57) 64.87 (1647.77) -5.07 (-128.81) -7.3%
Sidewall Height inches (mm) 3.63 (92.25) 2.82 (71.75) -0.81 (-20.5) -22.2%
Revolutions per mile (km) 905.87 (562.88) 976.68 (606.88) 70.81 (44) 7.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.55 mph (29.85 km/h)
25 mph (40.23 km/h)23.19 mph (37.32 km/h)
30 mph (48.28 km/h)27.82 mph (44.78 km/h)
35 mph (56.33 km/h)32.46 mph (52.24 km/h)
40 mph (64.37 km/h)37.1 mph (59.71 km/h)
45 mph (72.42 km/h)41.74 mph (67.17 km/h)
50 mph (80.47 km/h)46.37 mph (74.63 km/h)
55 mph (88.51 km/h)51.01 mph (82.1 km/h)
60 mph (96.56 km/h)55.65 mph (89.56 km/h)
65 mph (104.61 km/h)60.29 mph (97.02 km/h)
70 mph (112.65 km/h)64.92 mph (104.49 km/h)
75 mph (120.7 km/h)69.56 mph (111.95 km/h)
80 mph (128.75 km/h)74.2 mph (119.41 km/h)
85 mph (136.79 km/h)78.84 mph (126.88 km/h)
90 mph (144.84 km/h)83.47 mph (134.34 km/h)
95 mph (152.89 km/h)88.11 mph (141.8 km/h)
100 mph (160.93 km/h)92.75 mph (149.27 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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