Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/65r16 vs 255/40r19 Tire Comparison Side By Side
  205/65-16 255/40-19 Difference
Diameter inches (mm) 26.49 (672.9) 27.03 (686.6) 0.54 (13.7) 2%
Width inches (mm) 8.07 (205) 10.04 (255) 1.97 (50) 24.4%
Circum. inches (mm) 83.23 (2113.98) 84.92 (2157.02) 1.69 (43.04) 2%
Sidewall Height inches (mm) 5.25 (133.25) 4.02 (102) -1.23 (-31.25) -23.5%
Revolutions per mile (km) 761.29 (473.04) 746.1 (463.6) -15.19 (-9.44) -2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.41 mph (32.84 km/h)
25 mph (40.23 km/h)25.51 mph (41.05 km/h)
30 mph (48.28 km/h)30.61 mph (49.26 km/h)
35 mph (56.33 km/h)35.71 mph (57.47 km/h)
40 mph (64.37 km/h)40.81 mph (65.68 km/h)
45 mph (72.42 km/h)45.92 mph (73.9 km/h)
50 mph (80.47 km/h)51.02 mph (82.11 km/h)
55 mph (88.51 km/h)56.12 mph (90.32 km/h)
60 mph (96.56 km/h)61.22 mph (98.53 km/h)
65 mph (104.61 km/h)66.32 mph (106.74 km/h)
70 mph (112.65 km/h)71.43 mph (114.95 km/h)
75 mph (120.7 km/h)76.53 mph (123.16 km/h)
80 mph (128.75 km/h)81.63 mph (131.37 km/h)
85 mph (136.79 km/h)86.73 mph (139.58 km/h)
90 mph (144.84 km/h)91.83 mph (147.79 km/h)
95 mph (152.89 km/h)96.93 mph (156 km/h)
100 mph (160.93 km/h)102.04 mph (164.21 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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