Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/50r16 vs 245/50r16 Tire Comparison Side By Side
  225/50-16 245/50-16 Difference
Diameter inches (mm) 24.86 (631.4) 25.65 (651.4) 0.79 (20) 3.2%
Width inches (mm) 8.86 (225) 9.65 (245) 0.79 (20) 8.9%
Circum. inches (mm) 78.09 (1983.6) 80.57 (2046.43) 2.47 (62.83) 3.2%
Sidewall Height inches (mm) 4.43 (112.5) 4.82 (122.5) 0.39 (10) 8.9%
Revolutions per mile (km) 811.32 (504.13) 786.41 (488.65) -24.91 (-15.48) -3.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.63 mph (33.21 km/h)
25 mph (40.23 km/h)25.79 mph (41.51 km/h)
30 mph (48.28 km/h)30.95 mph (49.81 km/h)
35 mph (56.33 km/h)36.11 mph (58.11 km/h)
40 mph (64.37 km/h)41.27 mph (66.41 km/h)
45 mph (72.42 km/h)46.43 mph (74.71 km/h)
50 mph (80.47 km/h)51.58 mph (83.02 km/h)
55 mph (88.51 km/h)56.74 mph (91.32 km/h)
60 mph (96.56 km/h)61.9 mph (99.62 km/h)
65 mph (104.61 km/h)67.06 mph (107.92 km/h)
70 mph (112.65 km/h)72.22 mph (116.22 km/h)
75 mph (120.7 km/h)77.38 mph (124.52 km/h)
80 mph (128.75 km/h)82.53 mph (132.83 km/h)
85 mph (136.79 km/h)87.69 mph (141.13 km/h)
90 mph (144.84 km/h)92.85 mph (149.43 km/h)
95 mph (152.89 km/h)98.01 mph (157.73 km/h)
100 mph (160.93 km/h)103.17 mph (166.03 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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