Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
196/65r15 vs 205/50r27 Tire Comparison Side By Side
  196/65-15 205/50-27 Difference
Diameter inches (mm) 25.03 (635.8) 35.07 (890.8) 10.04 (255) 40.1%
Width inches (mm) 7.72 (196) 8.07 (205) 0.35 (9) 4.6%
Circum. inches (mm) 78.64 (1997.42) 110.18 (2798.53) 31.54 (801.11) 40.1%
Sidewall Height inches (mm) 5.02 (127.4) 4.04 (102.5) -0.98 (-24.9) -19.5%
Revolutions per mile (km) 805.71 (500.64) 575.07 (357.33) -230.64 (-143.31) -28.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)28.02 mph (45.1 km/h)
25 mph (40.23 km/h)35.03 mph (56.37 km/h)
30 mph (48.28 km/h)42.03 mph (67.64 km/h)
35 mph (56.33 km/h)49.04 mph (78.92 km/h)
40 mph (64.37 km/h)56.04 mph (90.19 km/h)
45 mph (72.42 km/h)63.05 mph (101.47 km/h)
50 mph (80.47 km/h)70.05 mph (112.74 km/h)
55 mph (88.51 km/h)77.06 mph (124.01 km/h)
60 mph (96.56 km/h)84.06 mph (135.29 km/h)
65 mph (104.61 km/h)91.07 mph (146.56 km/h)
70 mph (112.65 km/h)98.07 mph (157.84 km/h)
75 mph (120.7 km/h)105.08 mph (169.11 km/h)
80 mph (128.75 km/h)112.09 mph (180.38 km/h)
85 mph (136.79 km/h)119.09 mph (191.66 km/h)
90 mph (144.84 km/h)126.1 mph (202.93 km/h)
95 mph (152.89 km/h)133.1 mph (214.21 km/h)
100 mph (160.93 km/h)140.11 mph (225.48 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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