Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/65r15 vs 195/60r15 Tire Comparison Side By Side
  175/65-15 195/60-15 Difference
Diameter inches (mm) 23.96 (608.5) 24.21 (615) 0.26 (6.5) 1.1%
Width inches (mm) 6.89 (175) 7.68 (195) 0.79 (20) 11.4%
Circum. inches (mm) 75.26 (1911.66) 76.07 (1932.08) 0.8 (20.42) 1.1%
Sidewall Height inches (mm) 4.48 (113.75) 4.61 (117) 0.13 (3.25) 2.9%
Revolutions per mile (km) 841.86 (523.1) 832.96 (517.58) -8.9 (-5.53) -1.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.21 mph (32.53 km/h)
25 mph (40.23 km/h)25.27 mph (40.66 km/h)
30 mph (48.28 km/h)30.32 mph (48.8 km/h)
35 mph (56.33 km/h)35.37 mph (56.93 km/h)
40 mph (64.37 km/h)40.43 mph (65.06 km/h)
45 mph (72.42 km/h)45.48 mph (73.19 km/h)
50 mph (80.47 km/h)50.53 mph (81.33 km/h)
55 mph (88.51 km/h)55.59 mph (89.46 km/h)
60 mph (96.56 km/h)60.64 mph (97.59 km/h)
65 mph (104.61 km/h)65.69 mph (105.72 km/h)
70 mph (112.65 km/h)70.75 mph (113.86 km/h)
75 mph (120.7 km/h)75.8 mph (121.99 km/h)
80 mph (128.75 km/h)80.85 mph (130.12 km/h)
85 mph (136.79 km/h)85.91 mph (138.26 km/h)
90 mph (144.84 km/h)90.96 mph (146.39 km/h)
95 mph (152.89 km/h)96.01 mph (154.52 km/h)
100 mph (160.93 km/h)101.07 mph (162.65 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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