Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r16 vs 235/85r16 Tire Comparison Side By Side
  265/70-16 235/85-16 Difference
Diameter inches (mm) 30.61 (777.4) 31.73 (805.9) 1.12 (28.5) 3.7%
Width inches (mm) 10.43 (265) 9.25 (235) -1.18 (-30) -11.3%
Circum. inches (mm) 96.15 (2442.27) 99.68 (2531.81) 3.53 (89.54) 3.7%
Sidewall Height inches (mm) 7.3 (185.5) 7.86 (199.75) 0.56 (14.25) 7.7%
Revolutions per mile (km) 658.95 (409.45) 635.65 (394.97) -23.3 (-14.48) -3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.73 mph (33.37 km/h)
25 mph (40.23 km/h)25.92 mph (41.71 km/h)
30 mph (48.28 km/h)31.1 mph (50.05 km/h)
35 mph (56.33 km/h)36.28 mph (58.39 km/h)
40 mph (64.37 km/h)41.47 mph (66.73 km/h)
45 mph (72.42 km/h)46.65 mph (75.08 km/h)
50 mph (80.47 km/h)51.83 mph (83.42 km/h)
55 mph (88.51 km/h)57.02 mph (91.76 km/h)
60 mph (96.56 km/h)62.2 mph (100.1 km/h)
65 mph (104.61 km/h)67.38 mph (108.44 km/h)
70 mph (112.65 km/h)72.57 mph (116.78 km/h)
75 mph (120.7 km/h)77.75 mph (125.13 km/h)
80 mph (128.75 km/h)82.93 mph (133.47 km/h)
85 mph (136.79 km/h)88.12 mph (141.81 km/h)
90 mph (144.84 km/h)93.3 mph (150.15 km/h)
95 mph (152.89 km/h)98.48 mph (158.49 km/h)
100 mph (160.93 km/h)103.67 mph (166.83 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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