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 195/65r15 Tire Comparison Side By Side
  205/65-16 195/65-15 Difference
Diameter inches (mm) 26.49 (672.9) 24.98 (634.5) -1.51 (-38.4) -5.7%
Width inches (mm) 8.07 (205) 7.68 (195) -0.39 (-10) -4.9%
Circum. inches (mm) 83.23 (2113.98) 78.48 (1993.34) -4.75 (-120.64) -5.7%
Sidewall Height inches (mm) 5.25 (133.25) 4.99 (126.75) -0.26 (-6.5) -4.9%
Revolutions per mile (km) 761.29 (473.04) 807.36 (501.67) 46.07 (28.63) 6.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.86 mph (30.35 km/h)
25 mph (40.23 km/h)23.57 mph (37.94 km/h)
30 mph (48.28 km/h)28.29 mph (45.53 km/h)
35 mph (56.33 km/h)33 mph (53.11 km/h)
40 mph (64.37 km/h)37.72 mph (60.7 km/h)
45 mph (72.42 km/h)42.43 mph (68.29 km/h)
50 mph (80.47 km/h)47.15 mph (75.88 km/h)
55 mph (88.51 km/h)51.86 mph (83.46 km/h)
60 mph (96.56 km/h)56.58 mph (91.05 km/h)
65 mph (104.61 km/h)61.29 mph (98.64 km/h)
70 mph (112.65 km/h)66.01 mph (106.23 km/h)
75 mph (120.7 km/h)70.72 mph (113.81 km/h)
80 mph (128.75 km/h)75.43 mph (121.4 km/h)
85 mph (136.79 km/h)80.15 mph (128.99 km/h)
90 mph (144.84 km/h)84.86 mph (136.58 km/h)
95 mph (152.89 km/h)89.58 mph (144.16 km/h)
100 mph (160.93 km/h)94.29 mph (151.75 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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