Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/70r17 vs 35/11.5r17 Tire Comparison Side By Side
  315/70-17 35/11.5-17 Difference
Diameter inches (mm) 34.36 (872.8) 34.93 (887.32) 0.57 (14.52) 1.7%
Width inches (mm) 12.4 (315) 11.5 (292) -0.91 (-23) -7.3%
Circum. inches (mm) 107.95 (2741.98) 109.75 (2787.6) 1.8 (45.62) 1.7%
Sidewall Height inches (mm) 8.68 (220.5) 8.97 (227.76) 0.29 (7.26) 3.3%
Revolutions per mile (km) 586.93 (364.7) 577.32 (358.73) -9.6 (-5.97) -1.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.33 mph (32.72 km/h)
25 mph (40.23 km/h)25.42 mph (40.9 km/h)
30 mph (48.28 km/h)30.5 mph (49.08 km/h)
35 mph (56.33 km/h)35.58 mph (57.26 km/h)
40 mph (64.37 km/h)40.67 mph (65.44 km/h)
45 mph (72.42 km/h)45.75 mph (73.63 km/h)
50 mph (80.47 km/h)50.83 mph (81.81 km/h)
55 mph (88.51 km/h)55.91 mph (89.99 km/h)
60 mph (96.56 km/h)61 mph (98.17 km/h)
65 mph (104.61 km/h)66.08 mph (106.35 km/h)
70 mph (112.65 km/h)71.16 mph (114.53 km/h)
75 mph (120.7 km/h)76.25 mph (122.71 km/h)
80 mph (128.75 km/h)81.33 mph (130.89 km/h)
85 mph (136.79 km/h)86.41 mph (139.07 km/h)
90 mph (144.84 km/h)91.5 mph (147.25 km/h)
95 mph (152.89 km/h)96.58 mph (155.43 km/h)
100 mph (160.93 km/h)101.66 mph (163.61 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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