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 225/25r16 Tire Comparison Side By Side
  245/35-16 225/25-16 Difference
Diameter inches (mm) 22.75 (577.9) 20.43 (518.9) -2.32 (-59) -10.2%
Width inches (mm) 9.65 (245) 8.86 (225) -0.79 (-20) -8.2%
Circum. inches (mm) 71.48 (1815.53) 64.18 (1630.17) -7.3 (-185.35) -10.2%
Sidewall Height inches (mm) 3.38 (85.75) 2.21 (56.25) -1.16 (-29.5) -34.4%
Revolutions per mile (km) 886.43 (550.8) 987.22 (613.43) 100.79 (62.63) 11.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.96 mph (28.9 km/h)
25 mph (40.23 km/h)22.45 mph (36.13 km/h)
30 mph (48.28 km/h)26.94 mph (43.35 km/h)
35 mph (56.33 km/h)31.43 mph (50.58 km/h)
40 mph (64.37 km/h)35.92 mph (57.8 km/h)
45 mph (72.42 km/h)40.41 mph (65.03 km/h)
50 mph (80.47 km/h)44.9 mph (72.25 km/h)
55 mph (88.51 km/h)49.38 mph (79.48 km/h)
60 mph (96.56 km/h)53.87 mph (86.7 km/h)
65 mph (104.61 km/h)58.36 mph (93.93 km/h)
70 mph (112.65 km/h)62.85 mph (101.15 km/h)
75 mph (120.7 km/h)67.34 mph (108.38 km/h)
80 mph (128.75 km/h)71.83 mph (115.6 km/h)
85 mph (136.79 km/h)76.32 mph (122.83 km/h)
90 mph (144.84 km/h)80.81 mph (130.05 km/h)
95 mph (152.89 km/h)85.3 mph (137.28 km/h)
100 mph (160.93 km/h)89.79 mph (144.5 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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