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 205/50r16 Tire Comparison Side By Side
  205/65-16 205/50-16 Difference
Diameter inches (mm) 26.49 (672.9) 24.07 (611.4) -2.42 (-61.5) -9.1%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 83.23 (2113.98) 75.62 (1920.77) -7.61 (-193.21) -9.1%
Sidewall Height inches (mm) 5.25 (133.25) 4.04 (102.5) -1.21 (-30.75) -23.1%
Revolutions per mile (km) 761.29 (473.04) 837.86 (520.62) 76.58 (47.58) 10.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.17 mph (29.25 km/h)
25 mph (40.23 km/h)22.72 mph (36.56 km/h)
30 mph (48.28 km/h)27.26 mph (43.87 km/h)
35 mph (56.33 km/h)31.8 mph (51.18 km/h)
40 mph (64.37 km/h)36.34 mph (58.49 km/h)
45 mph (72.42 km/h)40.89 mph (65.8 km/h)
50 mph (80.47 km/h)45.43 mph (73.11 km/h)
55 mph (88.51 km/h)49.97 mph (80.42 km/h)
60 mph (96.56 km/h)54.52 mph (87.74 km/h)
65 mph (104.61 km/h)59.06 mph (95.05 km/h)
70 mph (112.65 km/h)63.6 mph (102.36 km/h)
75 mph (120.7 km/h)68.15 mph (109.67 km/h)
80 mph (128.75 km/h)72.69 mph (116.98 km/h)
85 mph (136.79 km/h)77.23 mph (124.29 km/h)
90 mph (144.84 km/h)81.77 mph (131.6 km/h)
95 mph (152.89 km/h)86.32 mph (138.91 km/h)
100 mph (160.93 km/h)90.86 mph (146.23 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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