Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/65r16 vs 235/75r16 Tire Comparison Side By Side
  235/65-16 235/75-16 Difference
Diameter inches (mm) 28.03 (711.9) 29.88 (758.9) 1.85 (47) 6.6%
Width inches (mm) 9.25 (235) 9.25 (235) 0 (0) 0%
Circum. inches (mm) 88.05 (2236.5) 93.86 (2384.15) 5.81 (147.65) 6.6%
Sidewall Height inches (mm) 6.01 (152.75) 6.94 (176.25) 0.93 (23.5) 15.4%
Revolutions per mile (km) 719.58 (447.13) 675.02 (419.44) -44.56 (-27.69) -6.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.32 mph (34.31 km/h)
25 mph (40.23 km/h)26.65 mph (42.89 km/h)
30 mph (48.28 km/h)31.98 mph (51.47 km/h)
35 mph (56.33 km/h)37.31 mph (60.05 km/h)
40 mph (64.37 km/h)42.64 mph (68.62 km/h)
45 mph (72.42 km/h)47.97 mph (77.2 km/h)
50 mph (80.47 km/h)53.3 mph (85.78 km/h)
55 mph (88.51 km/h)58.63 mph (94.36 km/h)
60 mph (96.56 km/h)63.96 mph (102.94 km/h)
65 mph (104.61 km/h)69.29 mph (111.51 km/h)
70 mph (112.65 km/h)74.62 mph (120.09 km/h)
75 mph (120.7 km/h)79.95 mph (128.67 km/h)
80 mph (128.75 km/h)85.28 mph (137.25 km/h)
85 mph (136.79 km/h)90.61 mph (145.83 km/h)
90 mph (144.84 km/h)95.94 mph (154.4 km/h)
95 mph (152.89 km/h)101.27 mph (162.98 km/h)
100 mph (160.93 km/h)106.6 mph (171.56 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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