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 35/12.5r17 Tire Comparison Side By Side
  275/75-17 35/12.5-17 Difference
Diameter inches (mm) 33.24 (844.3) 35.03 (889.72) 1.79 (45.42) 5.4%
Width inches (mm) 10.83 (275) 12.52 (318) 1.69 (43) 15.6%
Circum. inches (mm) 104.43 (2652.45) 110.04 (2795.14) 5.62 (142.69) 5.4%
Sidewall Height inches (mm) 8.12 (206.25) 9.01 (228.96) 0.89 (22.71) 11%
Revolutions per mile (km) 606.74 (377.01) 575.77 (357.76) -30.97 (-19.25) -5.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.08 mph (33.92 km/h)
25 mph (40.23 km/h)26.34 mph (42.4 km/h)
30 mph (48.28 km/h)31.61 mph (50.88 km/h)
35 mph (56.33 km/h)36.88 mph (59.36 km/h)
40 mph (64.37 km/h)42.15 mph (67.84 km/h)
45 mph (72.42 km/h)47.42 mph (76.32 km/h)
50 mph (80.47 km/h)52.69 mph (84.8 km/h)
55 mph (88.51 km/h)57.96 mph (93.28 km/h)
60 mph (96.56 km/h)63.23 mph (101.76 km/h)
65 mph (104.61 km/h)68.5 mph (110.24 km/h)
70 mph (112.65 km/h)73.77 mph (118.71 km/h)
75 mph (120.7 km/h)79.03 mph (127.19 km/h)
80 mph (128.75 km/h)84.3 mph (135.67 km/h)
85 mph (136.79 km/h)89.57 mph (144.15 km/h)
90 mph (144.84 km/h)94.84 mph (152.63 km/h)
95 mph (152.89 km/h)100.11 mph (161.11 km/h)
100 mph (160.93 km/h)105.38 mph (169.59 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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