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 215/70r16 Tire Comparison Side By Side
  205/65-16 215/70-16 Difference
Diameter inches (mm) 26.49 (672.9) 27.85 (707.4) 1.36 (34.5) 5.1%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 83.23 (2113.98) 87.49 (2222.36) 4.27 (108.38) 5.1%
Sidewall Height inches (mm) 5.25 (133.25) 5.93 (150.5) 0.68 (17.25) 12.9%
Revolutions per mile (km) 761.29 (473.04) 724.16 (449.97) -37.13 (-23.07) -4.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.03 mph (33.84 km/h)
25 mph (40.23 km/h)26.28 mph (42.3 km/h)
30 mph (48.28 km/h)31.54 mph (50.76 km/h)
35 mph (56.33 km/h)36.79 mph (59.22 km/h)
40 mph (64.37 km/h)42.05 mph (67.67 km/h)
45 mph (72.42 km/h)47.31 mph (76.13 km/h)
50 mph (80.47 km/h)52.56 mph (84.59 km/h)
55 mph (88.51 km/h)57.82 mph (93.05 km/h)
60 mph (96.56 km/h)63.08 mph (101.51 km/h)
65 mph (104.61 km/h)68.33 mph (109.97 km/h)
70 mph (112.65 km/h)73.59 mph (118.43 km/h)
75 mph (120.7 km/h)78.85 mph (126.89 km/h)
80 mph (128.75 km/h)84.1 mph (135.35 km/h)
85 mph (136.79 km/h)89.36 mph (143.81 km/h)
90 mph (144.84 km/h)94.61 mph (152.27 km/h)
95 mph (152.89 km/h)99.87 mph (160.73 km/h)
100 mph (160.93 km/h)105.13 mph (169.19 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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