Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/50r17 vs 205/60r16 Tire Comparison Side By Side
  225/50-17 205/60-16 Difference
Diameter inches (mm) 25.86 (656.8) 25.69 (652.4) -0.17 (-4.4) -0.7%
Width inches (mm) 8.86 (225) 8.07 (205) -0.79 (-20) -8.9%
Circum. inches (mm) 81.24 (2063.4) 80.69 (2049.58) -0.54 (-13.82) -0.7%
Sidewall Height inches (mm) 4.43 (112.5) 4.84 (123) 0.41 (10.5) 9.3%
Revolutions per mile (km) 779.95 (484.64) 785.21 (487.91) 5.26 (3.27) 0.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.87 mph (31.97 km/h)
25 mph (40.23 km/h)24.83 mph (39.96 km/h)
30 mph (48.28 km/h)29.8 mph (47.96 km/h)
35 mph (56.33 km/h)34.77 mph (55.95 km/h)
40 mph (64.37 km/h)39.73 mph (63.94 km/h)
45 mph (72.42 km/h)44.7 mph (71.94 km/h)
50 mph (80.47 km/h)49.67 mph (79.93 km/h)
55 mph (88.51 km/h)54.63 mph (87.92 km/h)
60 mph (96.56 km/h)59.6 mph (95.91 km/h)
65 mph (104.61 km/h)64.56 mph (103.91 km/h)
70 mph (112.65 km/h)69.53 mph (111.9 km/h)
75 mph (120.7 km/h)74.5 mph (119.89 km/h)
80 mph (128.75 km/h)79.46 mph (127.89 km/h)
85 mph (136.79 km/h)84.43 mph (135.88 km/h)
90 mph (144.84 km/h)89.4 mph (143.87 km/h)
95 mph (152.89 km/h)94.36 mph (151.86 km/h)
100 mph (160.93 km/h)99.33 mph (159.86 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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