Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/60r14 vs 175/70r14 Tire Comparison Side By Side
  175/60-14 175/70-14 Difference
Diameter inches (mm) 22.27 (565.6) 23.65 (600.6) 1.38 (35) 6.2%
Width inches (mm) 6.89 (175) 6.89 (175) 0 (0) 0%
Circum. inches (mm) 69.96 (1776.88) 74.29 (1886.84) 4.33 (109.96) 6.2%
Sidewall Height inches (mm) 4.13 (105) 4.82 (122.5) 0.69 (17.5) 16.7%
Revolutions per mile (km) 905.71 (562.78) 852.93 (529.99) -52.78 (-32.8) -5.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.24 mph (34.18 km/h)
25 mph (40.23 km/h)26.55 mph (42.72 km/h)
30 mph (48.28 km/h)31.86 mph (51.27 km/h)
35 mph (56.33 km/h)37.17 mph (59.81 km/h)
40 mph (64.37 km/h)42.48 mph (68.36 km/h)
45 mph (72.42 km/h)47.78 mph (76.9 km/h)
50 mph (80.47 km/h)53.09 mph (85.45 km/h)
55 mph (88.51 km/h)58.4 mph (93.99 km/h)
60 mph (96.56 km/h)63.71 mph (102.54 km/h)
65 mph (104.61 km/h)69.02 mph (111.08 km/h)
70 mph (112.65 km/h)74.33 mph (119.63 km/h)
75 mph (120.7 km/h)79.64 mph (128.17 km/h)
80 mph (128.75 km/h)84.95 mph (136.71 km/h)
85 mph (136.79 km/h)90.26 mph (145.26 km/h)
90 mph (144.84 km/h)95.57 mph (153.8 km/h)
95 mph (152.89 km/h)100.88 mph (162.35 km/h)
100 mph (160.93 km/h)106.19 mph (170.89 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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