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 31/10.5r16 Tire Comparison Side By Side
  265/70-16 31/10.5-16 Difference
Diameter inches (mm) 30.61 (777.4) 30.93 (785.54) 0.32 (8.14) 1%
Width inches (mm) 10.43 (265) 10.51 (267) 0.08 (2) 0.8%
Circum. inches (mm) 96.15 (2442.27) 97.16 (2467.85) 1.01 (25.57) 1%
Sidewall Height inches (mm) 7.3 (185.5) 7.46 (189.57) 0.16 (4.07) 2.2%
Revolutions per mile (km) 658.95 (409.45) 652.12 (405.21) -6.83 (-4.24) -1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.21 mph (32.52 km/h)
25 mph (40.23 km/h)25.26 mph (40.65 km/h)
30 mph (48.28 km/h)30.31 mph (48.79 km/h)
35 mph (56.33 km/h)35.37 mph (56.92 km/h)
40 mph (64.37 km/h)40.42 mph (65.05 km/h)
45 mph (72.42 km/h)45.47 mph (73.18 km/h)
50 mph (80.47 km/h)50.52 mph (81.31 km/h)
55 mph (88.51 km/h)55.58 mph (89.44 km/h)
60 mph (96.56 km/h)60.63 mph (97.57 km/h)
65 mph (104.61 km/h)65.68 mph (105.7 km/h)
70 mph (112.65 km/h)70.73 mph (113.83 km/h)
75 mph (120.7 km/h)75.79 mph (121.96 km/h)
80 mph (128.75 km/h)80.84 mph (130.1 km/h)
85 mph (136.79 km/h)85.89 mph (138.23 km/h)
90 mph (144.84 km/h)90.94 mph (146.36 km/h)
95 mph (152.89 km/h)95.99 mph (154.49 km/h)
100 mph (160.93 km/h)101.05 mph (162.62 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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