Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/80r19 vs 165/90r17 Tire Comparison Side By Side
  175/80-19 165/90-17 Difference
Diameter inches (mm) 30.02 (762.6) 28.69 (728.8) -1.33 (-33.8) -4.4%
Width inches (mm) 6.89 (175) 6.5 (165) -0.39 (-10) -5.7%
Circum. inches (mm) 94.32 (2395.78) 90.14 (2289.59) -4.18 (-106.19) -4.4%
Sidewall Height inches (mm) 5.51 (140) 5.85 (148.5) 0.33 (8.5) 6.1%
Revolutions per mile (km) 671.74 (417.4) 702.9 (436.76) 31.15 (19.36) 4.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.11 mph (30.76 km/h)
25 mph (40.23 km/h)23.89 mph (38.45 km/h)
30 mph (48.28 km/h)28.67 mph (46.14 km/h)
35 mph (56.33 km/h)33.45 mph (53.83 km/h)
40 mph (64.37 km/h)38.23 mph (61.52 km/h)
45 mph (72.42 km/h)43.01 mph (69.21 km/h)
50 mph (80.47 km/h)47.78 mph (76.9 km/h)
55 mph (88.51 km/h)52.56 mph (84.59 km/h)
60 mph (96.56 km/h)57.34 mph (92.28 km/h)
65 mph (104.61 km/h)62.12 mph (99.97 km/h)
70 mph (112.65 km/h)66.9 mph (107.66 km/h)
75 mph (120.7 km/h)71.68 mph (115.35 km/h)
80 mph (128.75 km/h)76.45 mph (123.04 km/h)
85 mph (136.79 km/h)81.23 mph (130.73 km/h)
90 mph (144.84 km/h)86.01 mph (138.42 km/h)
95 mph (152.89 km/h)90.79 mph (146.11 km/h)
100 mph (160.93 km/h)95.57 mph (153.8 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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