Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/60r13 vs 205/50r13 Tire Comparison Side By Side
  205/60-13 205/50-13 Difference
Diameter inches (mm) 22.69 (576.2) 21.07 (535.2) -1.61 (-41) -7.1%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 71.27 (1810.19) 66.2 (1681.38) -5.07 (-128.81) -7.1%
Sidewall Height inches (mm) 4.84 (123) 4.04 (102.5) -0.81 (-20.5) -16.7%
Revolutions per mile (km) 889.05 (552.43) 957.16 (594.75) 68.11 (42.32) 7.7%

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)23.22 mph (37.37 km/h)
30 mph (48.28 km/h)27.87 mph (44.84 km/h)
35 mph (56.33 km/h)32.51 mph (52.32 km/h)
40 mph (64.37 km/h)37.15 mph (59.79 km/h)
45 mph (72.42 km/h)41.8 mph (67.27 km/h)
50 mph (80.47 km/h)46.44 mph (74.74 km/h)
55 mph (88.51 km/h)51.09 mph (82.22 km/h)
60 mph (96.56 km/h)55.73 mph (89.69 km/h)
65 mph (104.61 km/h)60.37 mph (97.16 km/h)
70 mph (112.65 km/h)65.02 mph (104.64 km/h)
75 mph (120.7 km/h)69.66 mph (112.11 km/h)
80 mph (128.75 km/h)74.31 mph (119.59 km/h)
85 mph (136.79 km/h)78.95 mph (127.06 km/h)
90 mph (144.84 km/h)83.6 mph (134.53 km/h)
95 mph (152.89 km/h)88.24 mph (142.01 km/h)
100 mph (160.93 km/h)92.88 mph (149.48 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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