Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/65r14 vs 175/65r14 Tire Comparison Side By Side
  165/65-14 175/65-14 Difference
Diameter inches (mm) 22.44 (570.1) 22.96 (583.1) 0.51 (13) 2.3%
Width inches (mm) 6.5 (165) 6.89 (175) 0.39 (10) 6.1%
Circum. inches (mm) 70.51 (1791.02) 72.12 (1831.86) 1.61 (40.84) 2.3%
Sidewall Height inches (mm) 4.22 (107.25) 4.48 (113.75) 0.26 (6.5) 6.1%
Revolutions per mile (km) 898.56 (558.34) 878.53 (545.89) -20.03 (-12.45) -2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.46 mph (32.92 km/h)
25 mph (40.23 km/h)25.57 mph (41.15 km/h)
30 mph (48.28 km/h)30.68 mph (49.38 km/h)
35 mph (56.33 km/h)35.8 mph (57.61 km/h)
40 mph (64.37 km/h)40.91 mph (65.84 km/h)
45 mph (72.42 km/h)46.03 mph (74.07 km/h)
50 mph (80.47 km/h)51.14 mph (82.3 km/h)
55 mph (88.51 km/h)56.25 mph (90.53 km/h)
60 mph (96.56 km/h)61.37 mph (98.76 km/h)
65 mph (104.61 km/h)66.48 mph (106.99 km/h)
70 mph (112.65 km/h)71.6 mph (115.22 km/h)
75 mph (120.7 km/h)76.71 mph (123.45 km/h)
80 mph (128.75 km/h)81.82 mph (131.68 km/h)
85 mph (136.79 km/h)86.94 mph (139.91 km/h)
90 mph (144.84 km/h)92.05 mph (148.14 km/h)
95 mph (152.89 km/h)97.17 mph (156.37 km/h)
100 mph (160.93 km/h)102.28 mph (164.6 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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