Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/60r14 vs 215/60r14 Tire Comparison Side By Side
  225/60-14 215/60-14 Difference
Diameter inches (mm) 24.63 (625.6) 24.16 (613.6) -0.47 (-12) -1.9%
Width inches (mm) 8.86 (225) 8.46 (215) -0.39 (-10) -4.4%
Circum. inches (mm) 77.38 (1965.38) 75.89 (1927.68) -1.48 (-37.7) -1.9%
Sidewall Height inches (mm) 5.31 (135) 5.08 (129) -0.24 (-6) -4.4%
Revolutions per mile (km) 818.85 (508.81) 834.86 (518.76) 16.01 (9.95) 2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.62 mph (31.57 km/h)
25 mph (40.23 km/h)24.52 mph (39.46 km/h)
30 mph (48.28 km/h)29.42 mph (47.35 km/h)
35 mph (56.33 km/h)34.33 mph (55.25 km/h)
40 mph (64.37 km/h)39.23 mph (63.14 km/h)
45 mph (72.42 km/h)44.14 mph (71.03 km/h)
50 mph (80.47 km/h)49.04 mph (78.92 km/h)
55 mph (88.51 km/h)53.95 mph (86.82 km/h)
60 mph (96.56 km/h)58.85 mph (94.71 km/h)
65 mph (104.61 km/h)63.75 mph (102.6 km/h)
70 mph (112.65 km/h)68.66 mph (110.49 km/h)
75 mph (120.7 km/h)73.56 mph (118.39 km/h)
80 mph (128.75 km/h)78.47 mph (126.28 km/h)
85 mph (136.79 km/h)83.37 mph (134.17 km/h)
90 mph (144.84 km/h)88.27 mph (142.06 km/h)
95 mph (152.89 km/h)93.18 mph (149.96 km/h)
100 mph (160.93 km/h)98.08 mph (157.85 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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