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 175/70r14 Tire Comparison Side By Side
  165/65-14 175/70-14 Difference
Diameter inches (mm) 22.44 (570.1) 23.65 (600.6) 1.2 (30.5) 5.3%
Width inches (mm) 6.5 (165) 6.89 (175) 0.39 (10) 6.1%
Circum. inches (mm) 70.51 (1791.02) 74.29 (1886.84) 3.77 (95.82) 5.3%
Sidewall Height inches (mm) 4.22 (107.25) 4.82 (122.5) 0.6 (15.25) 14.2%
Revolutions per mile (km) 898.56 (558.34) 852.93 (529.99) -45.63 (-28.35) -5.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.07 mph (33.91 km/h)
25 mph (40.23 km/h)26.34 mph (42.39 km/h)
30 mph (48.28 km/h)31.6 mph (50.86 km/h)
35 mph (56.33 km/h)36.87 mph (59.34 km/h)
40 mph (64.37 km/h)42.14 mph (67.82 km/h)
45 mph (72.42 km/h)47.41 mph (76.3 km/h)
50 mph (80.47 km/h)52.67 mph (84.77 km/h)
55 mph (88.51 km/h)57.94 mph (93.25 km/h)
60 mph (96.56 km/h)63.21 mph (101.73 km/h)
65 mph (104.61 km/h)68.48 mph (110.2 km/h)
70 mph (112.65 km/h)73.74 mph (118.68 km/h)
75 mph (120.7 km/h)79.01 mph (127.16 km/h)
80 mph (128.75 km/h)84.28 mph (135.64 km/h)
85 mph (136.79 km/h)89.55 mph (144.11 km/h)
90 mph (144.84 km/h)94.81 mph (152.59 km/h)
95 mph (152.89 km/h)100.08 mph (161.07 km/h)
100 mph (160.93 km/h)105.35 mph (169.54 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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