Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/55r16 vs 195/65r15 Tire Comparison Side By Side
  195/55-16 195/65-15 Difference
Diameter inches (mm) 24.44 (620.9) 24.98 (634.5) 0.54 (13.6) 2.2%
Width inches (mm) 7.68 (195) 7.68 (195) 0 (0) 0%
Circum. inches (mm) 76.8 (1950.61) 78.48 (1993.34) 1.68 (42.73) 2.2%
Sidewall Height inches (mm) 4.22 (107.25) 4.99 (126.75) 0.77 (19.5) 18.2%
Revolutions per mile (km) 825.04 (512.66) 807.36 (501.67) -17.68 (-10.99) -2.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.44 mph (32.89 km/h)
25 mph (40.23 km/h)25.55 mph (41.11 km/h)
30 mph (48.28 km/h)30.66 mph (49.34 km/h)
35 mph (56.33 km/h)35.77 mph (57.56 km/h)
40 mph (64.37 km/h)40.88 mph (65.78 km/h)
45 mph (72.42 km/h)45.99 mph (74.01 km/h)
50 mph (80.47 km/h)51.1 mph (82.23 km/h)
55 mph (88.51 km/h)56.2 mph (90.45 km/h)
60 mph (96.56 km/h)61.31 mph (98.68 km/h)
65 mph (104.61 km/h)66.42 mph (106.9 km/h)
70 mph (112.65 km/h)71.53 mph (115.12 km/h)
75 mph (120.7 km/h)76.64 mph (123.34 km/h)
80 mph (128.75 km/h)81.75 mph (131.57 km/h)
85 mph (136.79 km/h)86.86 mph (139.79 km/h)
90 mph (144.84 km/h)91.97 mph (148.01 km/h)
95 mph (152.89 km/h)97.08 mph (156.24 km/h)
100 mph (160.93 km/h)102.19 mph (164.46 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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