Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/60r14 vs 215/60r14 Tire Comparison Side By Side
  245/60-14 215/60-14 Difference
Diameter inches (mm) 25.57 (649.6) 24.16 (613.6) -1.42 (-36) -5.5%
Width inches (mm) 9.65 (245) 8.46 (215) -1.18 (-30) -12.2%
Circum. inches (mm) 80.35 (2040.78) 75.89 (1927.68) -4.45 (-113.1) -5.5%
Sidewall Height inches (mm) 5.79 (147) 5.08 (129) -0.71 (-18) -12.2%
Revolutions per mile (km) 788.59 (490.01) 834.86 (518.76) 46.27 (28.75) 5.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.89 mph (30.4 km/h)
25 mph (40.23 km/h)23.61 mph (38 km/h)
30 mph (48.28 km/h)28.34 mph (45.6 km/h)
35 mph (56.33 km/h)33.06 mph (53.21 km/h)
40 mph (64.37 km/h)37.78 mph (60.81 km/h)
45 mph (72.42 km/h)42.51 mph (68.41 km/h)
50 mph (80.47 km/h)47.23 mph (76.01 km/h)
55 mph (88.51 km/h)51.95 mph (83.61 km/h)
60 mph (96.56 km/h)56.67 mph (91.21 km/h)
65 mph (104.61 km/h)61.4 mph (98.81 km/h)
70 mph (112.65 km/h)66.12 mph (106.41 km/h)
75 mph (120.7 km/h)70.84 mph (114.01 km/h)
80 mph (128.75 km/h)75.57 mph (121.61 km/h)
85 mph (136.79 km/h)80.29 mph (129.21 km/h)
90 mph (144.84 km/h)85.01 mph (136.81 km/h)
95 mph (152.89 km/h)89.74 mph (144.42 km/h)
100 mph (160.93 km/h)94.46 mph (152.02 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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