Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
31/10.5r16 vs 265/70r16 Tire Comparison Side By Side
  31/10.5-16 265/70-16 Difference
Diameter inches (mm) 30.93 (785.54) 30.61 (777.4) -0.32 (-8.14) -1%
Width inches (mm) 10.51 (267) 10.43 (265) -0.08 (-2) -0.7%
Circum. inches (mm) 97.16 (2467.85) 96.15 (2442.27) -1.01 (-25.57) -1%
Sidewall Height inches (mm) 7.46 (189.57) 7.3 (185.5) -0.16 (-4.07) -2.1%
Revolutions per mile (km) 652.12 (405.21) 658.95 (409.45) 6.83 (4.24) 1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.79 mph (31.85 km/h)
25 mph (40.23 km/h)24.74 mph (39.82 km/h)
30 mph (48.28 km/h)29.69 mph (47.78 km/h)
35 mph (56.33 km/h)34.64 mph (55.74 km/h)
40 mph (64.37 km/h)39.59 mph (63.71 km/h)
45 mph (72.42 km/h)44.53 mph (71.67 km/h)
50 mph (80.47 km/h)49.48 mph (79.63 km/h)
55 mph (88.51 km/h)54.43 mph (87.6 km/h)
60 mph (96.56 km/h)59.38 mph (95.56 km/h)
65 mph (104.61 km/h)64.33 mph (103.52 km/h)
70 mph (112.65 km/h)69.27 mph (111.49 km/h)
75 mph (120.7 km/h)74.22 mph (119.45 km/h)
80 mph (128.75 km/h)79.17 mph (127.41 km/h)
85 mph (136.79 km/h)84.12 mph (135.38 km/h)
90 mph (144.84 km/h)89.07 mph (143.34 km/h)
95 mph (152.89 km/h)94.02 mph (151.3 km/h)
100 mph (160.93 km/h)98.96 mph (159.27 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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