Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/30r14 vs 225/35r14 Tire Comparison Side By Side
  225/30-14 225/35-14 Difference
Diameter inches (mm) 19.31 (490.6) 20.2 (513.1) 0.89 (22.5) 4.6%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 60.68 (1541.27) 63.46 (1611.95) 2.78 (70.69) 4.6%
Sidewall Height inches (mm) 2.66 (67.5) 3.1 (78.75) 0.44 (11.25) 16.7%
Revolutions per mile (km) 1044.17 (648.82) 998.38 (620.36) -45.79 (-28.45) -4.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.92 mph (33.66 km/h)
25 mph (40.23 km/h)26.15 mph (42.08 km/h)
30 mph (48.28 km/h)31.38 mph (50.49 km/h)
35 mph (56.33 km/h)36.61 mph (58.91 km/h)
40 mph (64.37 km/h)41.83 mph (67.33 km/h)
45 mph (72.42 km/h)47.06 mph (75.74 km/h)
50 mph (80.47 km/h)52.29 mph (84.16 km/h)
55 mph (88.51 km/h)57.52 mph (92.57 km/h)
60 mph (96.56 km/h)62.75 mph (100.99 km/h)
65 mph (104.61 km/h)67.98 mph (109.41 km/h)
70 mph (112.65 km/h)73.21 mph (117.82 km/h)
75 mph (120.7 km/h)78.44 mph (126.24 km/h)
80 mph (128.75 km/h)83.67 mph (134.65 km/h)
85 mph (136.79 km/h)88.9 mph (143.07 km/h)
90 mph (144.84 km/h)94.13 mph (151.48 km/h)
95 mph (152.89 km/h)99.36 mph (159.9 km/h)
100 mph (160.93 km/h)104.59 mph (168.32 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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