Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/70r15 vs 235/60r16 Tire Comparison Side By Side
  205/70-15 235/60-16 Difference
Diameter inches (mm) 26.3 (668) 27.1 (688.4) 0.8 (20.4) 3.1%
Width inches (mm) 8.07 (205) 9.25 (235) 1.18 (30) 14.6%
Circum. inches (mm) 82.62 (2098.58) 85.14 (2162.67) 2.52 (64.09) 3.1%
Sidewall Height inches (mm) 5.65 (143.5) 5.55 (141) -0.1 (-2.5) -1.7%
Revolutions per mile (km) 766.87 (476.51) 744.15 (462.39) -22.73 (-14.12) -3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.61 mph (33.17 km/h)
25 mph (40.23 km/h)25.76 mph (41.46 km/h)
30 mph (48.28 km/h)30.92 mph (49.75 km/h)
35 mph (56.33 km/h)36.07 mph (58.05 km/h)
40 mph (64.37 km/h)41.22 mph (66.34 km/h)
45 mph (72.42 km/h)46.37 mph (74.63 km/h)
50 mph (80.47 km/h)51.53 mph (82.92 km/h)
55 mph (88.51 km/h)56.68 mph (91.22 km/h)
60 mph (96.56 km/h)61.83 mph (99.51 km/h)
65 mph (104.61 km/h)66.99 mph (107.8 km/h)
70 mph (112.65 km/h)72.14 mph (116.09 km/h)
75 mph (120.7 km/h)77.29 mph (124.39 km/h)
80 mph (128.75 km/h)82.44 mph (132.68 km/h)
85 mph (136.79 km/h)87.6 mph (140.97 km/h)
90 mph (144.84 km/h)92.75 mph (149.26 km/h)
95 mph (152.89 km/h)97.9 mph (157.56 km/h)
100 mph (160.93 km/h)103.05 mph (165.85 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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