Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/35r16 vs 225/50r16 Tire Comparison Side By Side
  245/35-16 225/50-16 Difference
Diameter inches (mm) 22.75 (577.9) 24.86 (631.4) 2.11 (53.5) 9.3%
Width inches (mm) 9.65 (245) 8.86 (225) -0.79 (-20) -8.2%
Circum. inches (mm) 71.48 (1815.53) 78.09 (1983.6) 6.62 (168.08) 9.3%
Sidewall Height inches (mm) 3.38 (85.75) 4.43 (112.5) 1.05 (26.75) 31.2%
Revolutions per mile (km) 886.43 (550.8) 811.32 (504.13) -75.11 (-46.67) -8.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.85 mph (35.17 km/h)
25 mph (40.23 km/h)27.31 mph (43.96 km/h)
30 mph (48.28 km/h)32.78 mph (52.75 km/h)
35 mph (56.33 km/h)38.24 mph (61.54 km/h)
40 mph (64.37 km/h)43.7 mph (70.33 km/h)
45 mph (72.42 km/h)49.17 mph (79.13 km/h)
50 mph (80.47 km/h)54.63 mph (87.92 km/h)
55 mph (88.51 km/h)60.09 mph (96.71 km/h)
60 mph (96.56 km/h)65.55 mph (105.5 km/h)
65 mph (104.61 km/h)71.02 mph (114.29 km/h)
70 mph (112.65 km/h)76.48 mph (123.08 km/h)
75 mph (120.7 km/h)81.94 mph (131.88 km/h)
80 mph (128.75 km/h)87.41 mph (140.67 km/h)
85 mph (136.79 km/h)92.87 mph (149.46 km/h)
90 mph (144.84 km/h)98.33 mph (158.25 km/h)
95 mph (152.89 km/h)103.79 mph (167.04 km/h)
100 mph (160.93 km/h)109.26 mph (175.83 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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