Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/65r14 vs 195/75r14 Tire Comparison Side By Side
  165/65-14 195/75-14 Difference
Diameter inches (mm) 22.44 (570.1) 25.52 (648.1) 3.07 (78) 13.7%
Width inches (mm) 6.5 (165) 7.68 (195) 1.18 (30) 18.2%
Circum. inches (mm) 70.51 (1791.02) 80.16 (2036.07) 9.65 (245.04) 13.7%
Sidewall Height inches (mm) 4.22 (107.25) 5.76 (146.25) 1.54 (39) 36.4%
Revolutions per mile (km) 898.56 (558.34) 790.42 (491.14) -108.14 (-67.2) -12%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.74 mph (36.59 km/h)
25 mph (40.23 km/h)28.42 mph (45.74 km/h)
30 mph (48.28 km/h)34.1 mph (54.89 km/h)
35 mph (56.33 km/h)39.79 mph (64.03 km/h)
40 mph (64.37 km/h)45.47 mph (73.18 km/h)
45 mph (72.42 km/h)51.16 mph (82.33 km/h)
50 mph (80.47 km/h)56.84 mph (91.48 km/h)
55 mph (88.51 km/h)62.52 mph (100.62 km/h)
60 mph (96.56 km/h)68.21 mph (109.77 km/h)
65 mph (104.61 km/h)73.89 mph (118.92 km/h)
70 mph (112.65 km/h)79.58 mph (128.07 km/h)
75 mph (120.7 km/h)85.26 mph (137.22 km/h)
80 mph (128.75 km/h)90.95 mph (146.36 km/h)
85 mph (136.79 km/h)96.63 mph (155.51 km/h)
90 mph (144.84 km/h)102.31 mph (164.66 km/h)
95 mph (152.89 km/h)108 mph (173.81 km/h)
100 mph (160.93 km/h)113.68 mph (182.95 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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