Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
32/10.5r17 vs 35/12.5r17 Tire Comparison Side By Side
  32/10.5-17 35/12.5-17 Difference
Diameter inches (mm) 31.93 (810.94) 35.03 (889.72) 3.1 (78.78) 9.7%
Width inches (mm) 10.51 (267) 12.52 (318) 2.01 (51) 19.1%
Circum. inches (mm) 100.3 (2547.64) 110.04 (2795.14) 9.74 (247.49) 9.7%
Sidewall Height inches (mm) 7.46 (189.57) 9.01 (228.96) 1.55 (39.39) 20.8%
Revolutions per mile (km) 631.7 (392.52) 575.77 (357.76) -55.93 (-34.76) -8.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.94 mph (35.31 km/h)
25 mph (40.23 km/h)27.43 mph (44.14 km/h)
30 mph (48.28 km/h)32.91 mph (52.97 km/h)
35 mph (56.33 km/h)38.4 mph (61.8 km/h)
40 mph (64.37 km/h)43.89 mph (70.63 km/h)
45 mph (72.42 km/h)49.37 mph (79.46 km/h)
50 mph (80.47 km/h)54.86 mph (88.28 km/h)
55 mph (88.51 km/h)60.34 mph (97.11 km/h)
60 mph (96.56 km/h)65.83 mph (105.94 km/h)
65 mph (104.61 km/h)71.31 mph (114.77 km/h)
70 mph (112.65 km/h)76.8 mph (123.6 km/h)
75 mph (120.7 km/h)82.29 mph (132.43 km/h)
80 mph (128.75 km/h)87.77 mph (141.26 km/h)
85 mph (136.79 km/h)93.26 mph (150.08 km/h)
90 mph (144.84 km/h)98.74 mph (158.91 km/h)
95 mph (152.89 km/h)104.23 mph (167.74 km/h)
100 mph (160.93 km/h)109.71 mph (176.57 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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