Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/75r17 vs 255/75r17 Tire Comparison Side By Side
  275/75-17 255/75-17 Difference
Diameter inches (mm) 33.24 (844.3) 32.06 (814.3) -1.18 (-30) -3.6%
Width inches (mm) 10.83 (275) 10.04 (255) -0.79 (-20) -7.3%
Circum. inches (mm) 104.43 (2652.45) 100.72 (2558.2) -3.71 (-94.25) -3.6%
Sidewall Height inches (mm) 8.12 (206.25) 7.53 (191.25) -0.59 (-15) -7.3%
Revolutions per mile (km) 606.74 (377.01) 629.09 (390.9) 22.35 (13.89) 3.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.29 mph (31.04 km/h)
25 mph (40.23 km/h)24.11 mph (38.8 km/h)
30 mph (48.28 km/h)28.93 mph (46.56 km/h)
35 mph (56.33 km/h)33.76 mph (54.33 km/h)
40 mph (64.37 km/h)38.58 mph (62.09 km/h)
45 mph (72.42 km/h)43.4 mph (69.85 km/h)
50 mph (80.47 km/h)48.22 mph (77.61 km/h)
55 mph (88.51 km/h)53.05 mph (85.37 km/h)
60 mph (96.56 km/h)57.87 mph (93.13 km/h)
65 mph (104.61 km/h)62.69 mph (100.89 km/h)
70 mph (112.65 km/h)67.51 mph (108.65 km/h)
75 mph (120.7 km/h)72.34 mph (116.41 km/h)
80 mph (128.75 km/h)77.16 mph (124.17 km/h)
85 mph (136.79 km/h)81.98 mph (131.93 km/h)
90 mph (144.84 km/h)86.8 mph (139.69 km/h)
95 mph (152.89 km/h)91.62 mph (147.46 km/h)
100 mph (160.93 km/h)96.45 mph (155.22 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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