Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/60r16 vs 215/65r16 Tire Comparison Side By Side
  235/60-16 215/65-16 Difference
Diameter inches (mm) 27.1 (688.4) 27 (685.9) -0.1 (-2.5) -0.4%
Width inches (mm) 9.25 (235) 8.46 (215) -0.79 (-20) -8.5%
Circum. inches (mm) 85.14 (2162.67) 84.84 (2154.82) -0.31 (-7.85) -0.4%
Sidewall Height inches (mm) 5.55 (141) 5.5 (139.75) -0.05 (-1.25) -0.9%
Revolutions per mile (km) 744.15 (462.39) 746.86 (464.08) 2.71 (1.69) 0.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.93 mph (32.07 km/h)
25 mph (40.23 km/h)24.91 mph (40.09 km/h)
30 mph (48.28 km/h)29.89 mph (48.11 km/h)
35 mph (56.33 km/h)34.87 mph (56.12 km/h)
40 mph (64.37 km/h)39.85 mph (64.14 km/h)
45 mph (72.42 km/h)44.84 mph (72.16 km/h)
50 mph (80.47 km/h)49.82 mph (80.18 km/h)
55 mph (88.51 km/h)54.8 mph (88.19 km/h)
60 mph (96.56 km/h)59.78 mph (96.21 km/h)
65 mph (104.61 km/h)64.76 mph (104.23 km/h)
70 mph (112.65 km/h)69.75 mph (112.25 km/h)
75 mph (120.7 km/h)74.73 mph (120.26 km/h)
80 mph (128.75 km/h)79.71 mph (128.28 km/h)
85 mph (136.79 km/h)84.69 mph (136.3 km/h)
90 mph (144.84 km/h)89.67 mph (144.32 km/h)
95 mph (152.89 km/h)94.65 mph (152.33 km/h)
100 mph (160.93 km/h)99.64 mph (160.35 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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