Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/50r16 vs 31/12.5r16 Tire Comparison Side By Side
  295/50-16 31/12.5-16 Difference
Diameter inches (mm) 27.61 (701.4) 31.02 (788) 3.41 (86.6) 12.3%
Width inches (mm) 11.61 (295) 12.52 (318) 0.91 (23) 7.8%
Circum. inches (mm) 86.75 (2203.51) 97.46 (2475.58) 10.71 (272.06) 12.3%
Sidewall Height inches (mm) 5.81 (147.5) 7.51 (190.8) 1.7 (43.3) 29.4%
Revolutions per mile (km) 730.35 (453.82) 650.09 (403.95) -80.26 (-49.87) -11%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.47 mph (36.16 km/h)
25 mph (40.23 km/h)28.09 mph (45.2 km/h)
30 mph (48.28 km/h)33.7 mph (54.24 km/h)
35 mph (56.33 km/h)39.32 mph (63.28 km/h)
40 mph (64.37 km/h)44.94 mph (72.32 km/h)
45 mph (72.42 km/h)50.56 mph (81.36 km/h)
50 mph (80.47 km/h)56.17 mph (90.4 km/h)
55 mph (88.51 km/h)61.79 mph (99.44 km/h)
60 mph (96.56 km/h)67.41 mph (108.48 km/h)
65 mph (104.61 km/h)73.03 mph (117.52 km/h)
70 mph (112.65 km/h)78.64 mph (126.56 km/h)
75 mph (120.7 km/h)84.26 mph (135.6 km/h)
80 mph (128.75 km/h)89.88 mph (144.64 km/h)
85 mph (136.79 km/h)95.49 mph (153.68 km/h)
90 mph (144.84 km/h)101.11 mph (162.72 km/h)
95 mph (152.89 km/h)106.73 mph (171.76 km/h)
100 mph (160.93 km/h)112.35 mph (180.8 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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