Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/80r13 vs 195/75r14 Tire Comparison Side By Side
  175/80-13 195/75-14 Difference
Diameter inches (mm) 24.02 (610.2) 25.52 (648.1) 1.49 (37.9) 6.2%
Width inches (mm) 6.89 (175) 7.68 (195) 0.79 (20) 11.4%
Circum. inches (mm) 75.47 (1917) 80.16 (2036.07) 4.69 (119.07) 6.2%
Sidewall Height inches (mm) 5.51 (140) 5.76 (146.25) 0.25 (6.25) 4.5%
Revolutions per mile (km) 839.51 (521.65) 790.42 (491.14) -49.09 (-30.51) -5.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.24 mph (34.19 km/h)
25 mph (40.23 km/h)26.55 mph (42.73 km/h)
30 mph (48.28 km/h)31.86 mph (51.28 km/h)
35 mph (56.33 km/h)37.17 mph (59.83 km/h)
40 mph (64.37 km/h)42.48 mph (68.37 km/h)
45 mph (72.42 km/h)47.79 mph (76.92 km/h)
50 mph (80.47 km/h)53.11 mph (85.47 km/h)
55 mph (88.51 km/h)58.42 mph (94.01 km/h)
60 mph (96.56 km/h)63.73 mph (102.56 km/h)
65 mph (104.61 km/h)69.04 mph (111.1 km/h)
70 mph (112.65 km/h)74.35 mph (119.65 km/h)
75 mph (120.7 km/h)79.66 mph (128.2 km/h)
80 mph (128.75 km/h)84.97 mph (136.74 km/h)
85 mph (136.79 km/h)90.28 mph (145.29 km/h)
90 mph (144.84 km/h)95.59 mph (153.84 km/h)
95 mph (152.89 km/h)100.9 mph (162.38 km/h)
100 mph (160.93 km/h)106.21 mph (170.93 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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