Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/85r16 vs 205/65r16 Tire Comparison Side By Side
  195/85-16 205/65-16 Difference
Diameter inches (mm) 29.05 (737.9) 26.49 (672.9) -2.56 (-65) -8.8%
Width inches (mm) 7.68 (195) 8.07 (205) 0.39 (10) 5.1%
Circum. inches (mm) 91.27 (2318.18) 83.23 (2113.98) -8.04 (-204.2) -8.8%
Sidewall Height inches (mm) 6.53 (165.75) 5.25 (133.25) -1.28 (-32.5) -19.6%
Revolutions per mile (km) 694.23 (431.37) 761.29 (473.04) 67.06 (41.67) 9.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.24 mph (29.35 km/h)
25 mph (40.23 km/h)22.8 mph (36.69 km/h)
30 mph (48.28 km/h)27.36 mph (44.03 km/h)
35 mph (56.33 km/h)31.92 mph (51.37 km/h)
40 mph (64.37 km/h)36.48 mph (58.7 km/h)
45 mph (72.42 km/h)41.04 mph (66.04 km/h)
50 mph (80.47 km/h)45.6 mph (73.38 km/h)
55 mph (88.51 km/h)50.16 mph (80.72 km/h)
60 mph (96.56 km/h)54.71 mph (88.05 km/h)
65 mph (104.61 km/h)59.27 mph (95.39 km/h)
70 mph (112.65 km/h)63.83 mph (102.73 km/h)
75 mph (120.7 km/h)68.39 mph (110.07 km/h)
80 mph (128.75 km/h)72.95 mph (117.41 km/h)
85 mph (136.79 km/h)77.51 mph (124.74 km/h)
90 mph (144.84 km/h)82.07 mph (132.08 km/h)
95 mph (152.89 km/h)86.63 mph (139.42 km/h)
100 mph (160.93 km/h)91.19 mph (146.76 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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