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 205/65r16 Tire Comparison Side By Side
  196/65-15 205/65-16 Difference
Diameter inches (mm) 25.03 (635.8) 26.49 (672.9) 1.46 (37.1) 5.8%
Width inches (mm) 7.72 (196) 8.07 (205) 0.35 (9) 4.6%
Circum. inches (mm) 78.64 (1997.42) 83.23 (2113.98) 4.59 (116.55) 5.8%
Sidewall Height inches (mm) 5.02 (127.4) 5.25 (133.25) 0.23 (5.85) 4.6%
Revolutions per mile (km) 805.71 (500.64) 761.29 (473.04) -44.42 (-27.6) -5.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.17 mph (34.07 km/h)
25 mph (40.23 km/h)26.46 mph (42.58 km/h)
30 mph (48.28 km/h)31.75 mph (51.1 km/h)
35 mph (56.33 km/h)37.04 mph (59.61 km/h)
40 mph (64.37 km/h)42.33 mph (68.13 km/h)
45 mph (72.42 km/h)47.63 mph (76.65 km/h)
50 mph (80.47 km/h)52.92 mph (85.16 km/h)
55 mph (88.51 km/h)58.21 mph (93.68 km/h)
60 mph (96.56 km/h)63.5 mph (102.2 km/h)
65 mph (104.61 km/h)68.79 mph (110.71 km/h)
70 mph (112.65 km/h)74.08 mph (119.23 km/h)
75 mph (120.7 km/h)79.38 mph (127.74 km/h)
80 mph (128.75 km/h)84.67 mph (136.26 km/h)
85 mph (136.79 km/h)89.96 mph (144.78 km/h)
90 mph (144.84 km/h)95.25 mph (153.29 km/h)
95 mph (152.89 km/h)100.54 mph (161.81 km/h)
100 mph (160.93 km/h)105.84 mph (170.33 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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