Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/70r14 vs 195/65r14 Tire Comparison Side By Side
  175/70-14 195/65-14 Difference
Diameter inches (mm) 23.65 (600.6) 23.98 (609.1) 0.33 (8.5) 1.4%
Width inches (mm) 6.89 (175) 7.68 (195) 0.79 (20) 11.4%
Circum. inches (mm) 74.29 (1886.84) 75.34 (1913.54) 1.05 (26.7) 1.4%
Sidewall Height inches (mm) 4.82 (122.5) 4.99 (126.75) 0.17 (4.25) 3.5%
Revolutions per mile (km) 852.93 (529.99) 841.03 (522.59) -11.9 (-7.4) -1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.28 mph (32.64 km/h)
25 mph (40.23 km/h)25.35 mph (40.8 km/h)
30 mph (48.28 km/h)30.42 mph (48.96 km/h)
35 mph (56.33 km/h)35.5 mph (57.12 km/h)
40 mph (64.37 km/h)40.57 mph (65.28 km/h)
45 mph (72.42 km/h)45.64 mph (73.45 km/h)
50 mph (80.47 km/h)50.71 mph (81.61 km/h)
55 mph (88.51 km/h)55.78 mph (89.77 km/h)
60 mph (96.56 km/h)60.85 mph (97.93 km/h)
65 mph (104.61 km/h)65.92 mph (106.09 km/h)
70 mph (112.65 km/h)70.99 mph (114.25 km/h)
75 mph (120.7 km/h)76.06 mph (122.41 km/h)
80 mph (128.75 km/h)81.13 mph (130.57 km/h)
85 mph (136.79 km/h)86.2 mph (138.73 km/h)
90 mph (144.84 km/h)91.27 mph (146.89 km/h)
95 mph (152.89 km/h)96.34 mph (155.05 km/h)
100 mph (160.93 km/h)101.42 mph (163.21 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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