Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/65r14 vs 165/75r14 Tire Comparison Side By Side
  175/65-14 165/75-14 Difference
Diameter inches (mm) 22.96 (583.1) 23.74 (603.1) 0.79 (20) 3.4%
Width inches (mm) 6.89 (175) 6.5 (165) -0.39 (-10) -5.7%
Circum. inches (mm) 72.12 (1831.86) 74.59 (1894.69) 2.47 (62.83) 3.4%
Sidewall Height inches (mm) 4.48 (113.75) 4.87 (123.75) 0.39 (10) 8.8%
Revolutions per mile (km) 878.53 (545.89) 849.39 (527.79) -29.13 (-18.1) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.69 mph (33.29 km/h)
25 mph (40.23 km/h)25.86 mph (41.61 km/h)
30 mph (48.28 km/h)31.03 mph (49.94 km/h)
35 mph (56.33 km/h)36.2 mph (58.26 km/h)
40 mph (64.37 km/h)41.37 mph (66.58 km/h)
45 mph (72.42 km/h)46.54 mph (74.9 km/h)
50 mph (80.47 km/h)51.71 mph (83.23 km/h)
55 mph (88.51 km/h)56.89 mph (91.55 km/h)
60 mph (96.56 km/h)62.06 mph (99.87 km/h)
65 mph (104.61 km/h)67.23 mph (108.2 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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