Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
230/60r15 vs 200/70r15 Tire Comparison Side By Side
  230/60-15 200/70-15 Difference
Diameter inches (mm) 25.87 (657) 26.02 (661) 0.16 (4) 0.6%
Width inches (mm) 9.06 (230) 7.87 (200) -1.18 (-30) -13%
Circum. inches (mm) 81.26 (2064.03) 81.76 (2076.59) 0.49 (12.57) 0.6%
Sidewall Height inches (mm) 5.43 (138) 5.51 (140) 0.08 (2) 1.4%
Revolutions per mile (km) 779.71 (484.49) 774.99 (481.56) -4.72 (-2.93) -0.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.12 mph (32.38 km/h)
25 mph (40.23 km/h)25.15 mph (40.48 km/h)
30 mph (48.28 km/h)30.18 mph (48.57 km/h)
35 mph (56.33 km/h)35.21 mph (56.67 km/h)
40 mph (64.37 km/h)40.24 mph (64.77 km/h)
45 mph (72.42 km/h)45.27 mph (72.86 km/h)
50 mph (80.47 km/h)50.3 mph (80.96 km/h)
55 mph (88.51 km/h)55.33 mph (89.05 km/h)
60 mph (96.56 km/h)60.37 mph (97.15 km/h)
65 mph (104.61 km/h)65.4 mph (105.24 km/h)
70 mph (112.65 km/h)70.43 mph (113.34 km/h)
75 mph (120.7 km/h)75.46 mph (121.44 km/h)
80 mph (128.75 km/h)80.49 mph (129.53 km/h)
85 mph (136.79 km/h)85.52 mph (137.63 km/h)
90 mph (144.84 km/h)90.55 mph (145.72 km/h)
95 mph (152.89 km/h)95.58 mph (153.82 km/h)
100 mph (160.93 km/h)100.61 mph (161.91 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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