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 245/60r14 Tire Comparison Side By Side
  225/60-14 245/60-14 Difference
Diameter inches (mm) 24.63 (625.6) 25.57 (649.6) 0.94 (24) 3.8%
Width inches (mm) 8.86 (225) 9.65 (245) 0.79 (20) 8.9%
Circum. inches (mm) 77.38 (1965.38) 80.35 (2040.78) 2.97 (75.4) 3.8%
Sidewall Height inches (mm) 5.31 (135) 5.79 (147) 0.47 (12) 8.9%
Revolutions per mile (km) 818.85 (508.81) 788.59 (490.01) -30.25 (-18.8) -3.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.77 mph (33.42 km/h)
25 mph (40.23 km/h)25.96 mph (41.78 km/h)
30 mph (48.28 km/h)31.15 mph (50.13 km/h)
35 mph (56.33 km/h)36.34 mph (58.49 km/h)
40 mph (64.37 km/h)41.53 mph (66.84 km/h)
45 mph (72.42 km/h)46.73 mph (75.2 km/h)
50 mph (80.47 km/h)51.92 mph (83.55 km/h)
55 mph (88.51 km/h)57.11 mph (91.91 km/h)
60 mph (96.56 km/h)62.3 mph (100.27 km/h)
65 mph (104.61 km/h)67.49 mph (108.62 km/h)
70 mph (112.65 km/h)72.69 mph (116.98 km/h)
75 mph (120.7 km/h)77.88 mph (125.33 km/h)
80 mph (128.75 km/h)83.07 mph (133.69 km/h)
85 mph (136.79 km/h)88.26 mph (142.04 km/h)
90 mph (144.84 km/h)93.45 mph (150.4 km/h)
95 mph (152.89 km/h)98.64 mph (158.75 km/h)
100 mph (160.93 km/h)103.84 mph (167.11 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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