Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/60r14 vs 165/70r14 Tire Comparison Side By Side
  165/60-14 165/70-14 Difference
Diameter inches (mm) 21.8 (553.6) 23.09 (586.6) 1.3 (33) 6%
Width inches (mm) 6.5 (165) 6.5 (165) 0 (0) 0%
Circum. inches (mm) 68.47 (1739.19) 72.55 (1842.86) 4.08 (103.67) 6%
Sidewall Height inches (mm) 3.9 (99) 4.55 (115.5) 0.65 (16.5) 16.7%
Revolutions per mile (km) 925.34 (574.98) 873.29 (542.63) -52.06 (-32.35) -5.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.19 mph (34.11 km/h)
25 mph (40.23 km/h)26.49 mph (42.63 km/h)
30 mph (48.28 km/h)31.79 mph (51.16 km/h)
35 mph (56.33 km/h)37.09 mph (59.68 km/h)
40 mph (64.37 km/h)42.38 mph (68.21 km/h)
45 mph (72.42 km/h)47.68 mph (76.74 km/h)
50 mph (80.47 km/h)52.98 mph (85.26 km/h)
55 mph (88.51 km/h)58.28 mph (93.79 km/h)
60 mph (96.56 km/h)63.58 mph (102.32 km/h)
65 mph (104.61 km/h)68.87 mph (110.84 km/h)
70 mph (112.65 km/h)74.17 mph (119.37 km/h)
75 mph (120.7 km/h)79.47 mph (127.9 km/h)
80 mph (128.75 km/h)84.77 mph (136.42 km/h)
85 mph (136.79 km/h)90.07 mph (144.95 km/h)
90 mph (144.84 km/h)95.36 mph (153.48 km/h)
95 mph (152.89 km/h)100.66 mph (162 km/h)
100 mph (160.93 km/h)105.96 mph (170.53 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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