Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/60r16 vs 275/40r17 Tire Comparison Side By Side
  225/60-16 275/40-17 Difference
Diameter inches (mm) 26.63 (676.4) 25.66 (651.8) -0.97 (-24.6) -3.6%
Width inches (mm) 8.86 (225) 10.83 (275) 1.97 (50) 22.2%
Circum. inches (mm) 83.66 (2124.97) 80.62 (2047.69) -3.04 (-77.28) -3.6%
Sidewall Height inches (mm) 5.31 (135) 4.33 (110) -0.98 (-25) -18.5%
Revolutions per mile (km) 757.35 (470.59) 785.93 (488.35) 28.58 (17.76) 3.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.27 mph (31.02 km/h)
25 mph (40.23 km/h)24.09 mph (38.77 km/h)
30 mph (48.28 km/h)28.91 mph (46.52 km/h)
35 mph (56.33 km/h)33.73 mph (54.28 km/h)
40 mph (64.37 km/h)38.55 mph (62.03 km/h)
45 mph (72.42 km/h)43.36 mph (69.79 km/h)
50 mph (80.47 km/h)48.18 mph (77.54 km/h)
55 mph (88.51 km/h)53 mph (85.29 km/h)
60 mph (96.56 km/h)57.82 mph (93.05 km/h)
65 mph (104.61 km/h)62.64 mph (100.8 km/h)
70 mph (112.65 km/h)67.45 mph (108.56 km/h)
75 mph (120.7 km/h)72.27 mph (116.31 km/h)
80 mph (128.75 km/h)77.09 mph (124.07 km/h)
85 mph (136.79 km/h)81.91 mph (131.82 km/h)
90 mph (144.84 km/h)86.73 mph (139.57 km/h)
95 mph (152.89 km/h)91.54 mph (147.33 km/h)
100 mph (160.93 km/h)96.36 mph (155.08 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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