Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/70r13 vs 165/65r14 Tire Comparison Side By Side
  165/70-13 165/65-14 Difference
Diameter inches (mm) 22.09 (561.2) 22.44 (570.1) 0.35 (8.9) 1.6%
Width inches (mm) 6.5 (165) 6.5 (165) 0 (0) 0%
Circum. inches (mm) 69.41 (1763.06) 70.51 (1791.02) 1.1 (27.96) 1.6%
Sidewall Height inches (mm) 4.55 (115.5) 4.22 (107.25) -0.32 (-8.25) -7.1%
Revolutions per mile (km) 912.81 (567.19) 898.56 (558.34) -14.25 (-8.85) -1.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.32 mph (32.7 km/h)
25 mph (40.23 km/h)25.4 mph (40.87 km/h)
30 mph (48.28 km/h)30.48 mph (49.05 km/h)
35 mph (56.33 km/h)35.56 mph (57.22 km/h)
40 mph (64.37 km/h)40.63 mph (65.39 km/h)
45 mph (72.42 km/h)45.71 mph (73.57 km/h)
50 mph (80.47 km/h)50.79 mph (81.74 km/h)
55 mph (88.51 km/h)55.87 mph (89.92 km/h)
60 mph (96.56 km/h)60.95 mph (98.09 km/h)
65 mph (104.61 km/h)66.03 mph (106.27 km/h)
70 mph (112.65 km/h)71.11 mph (114.44 km/h)
75 mph (120.7 km/h)76.19 mph (122.62 km/h)
80 mph (128.75 km/h)81.27 mph (130.79 km/h)
85 mph (136.79 km/h)86.35 mph (138.96 km/h)
90 mph (144.84 km/h)91.43 mph (147.14 km/h)
95 mph (152.89 km/h)96.51 mph (155.31 km/h)
100 mph (160.93 km/h)101.59 mph (163.49 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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