Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/70r16 vs 235/60r16 Tire Comparison Side By Side
  235/70-16 235/60-16 Difference
Diameter inches (mm) 28.95 (735.4) 27.1 (688.4) -1.85 (-47) -6.4%
Width inches (mm) 9.25 (235) 9.25 (235) 0 (0) 0%
Circum. inches (mm) 90.96 (2310.33) 85.14 (2162.67) -5.81 (-147.65) -6.4%
Sidewall Height inches (mm) 6.48 (164.5) 5.55 (141) -0.93 (-23.5) -14.3%
Revolutions per mile (km) 696.59 (432.84) 744.15 (462.39) 47.56 (29.55) 6.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.72 mph (30.13 km/h)
25 mph (40.23 km/h)23.4 mph (37.66 km/h)
30 mph (48.28 km/h)28.08 mph (45.19 km/h)
35 mph (56.33 km/h)32.76 mph (52.73 km/h)
40 mph (64.37 km/h)37.44 mph (60.26 km/h)
45 mph (72.42 km/h)42.12 mph (67.79 km/h)
50 mph (80.47 km/h)46.8 mph (75.32 km/h)
55 mph (88.51 km/h)51.48 mph (82.86 km/h)
60 mph (96.56 km/h)56.17 mph (90.39 km/h)
65 mph (104.61 km/h)60.85 mph (97.92 km/h)
70 mph (112.65 km/h)65.53 mph (105.45 km/h)
75 mph (120.7 km/h)70.21 mph (112.99 km/h)
80 mph (128.75 km/h)74.89 mph (120.52 km/h)
85 mph (136.79 km/h)79.57 mph (128.05 km/h)
90 mph (144.84 km/h)84.25 mph (135.58 km/h)
95 mph (152.89 km/h)88.93 mph (143.12 km/h)
100 mph (160.93 km/h)93.61 mph (150.65 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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