Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/65r17 vs 215/55r17 Tire Comparison Side By Side
  215/65-17 215/55-17 Difference
Diameter inches (mm) 28 (711.3) 26.31 (668.3) -1.69 (-43) -6%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 87.98 (2234.61) 82.66 (2099.53) -5.32 (-135.09) -6%
Sidewall Height inches (mm) 5.5 (139.75) 4.66 (118.25) -0.85 (-21.5) -15.4%
Revolutions per mile (km) 720.19 (447.5) 766.53 (476.3) 46.34 (28.79) 6.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.79 mph (30.24 km/h)
25 mph (40.23 km/h)23.49 mph (37.8 km/h)
30 mph (48.28 km/h)28.19 mph (45.36 km/h)
35 mph (56.33 km/h)32.88 mph (52.92 km/h)
40 mph (64.37 km/h)37.58 mph (60.48 km/h)
45 mph (72.42 km/h)42.28 mph (68.04 km/h)
50 mph (80.47 km/h)46.98 mph (75.6 km/h)
55 mph (88.51 km/h)51.68 mph (83.16 km/h)
60 mph (96.56 km/h)56.37 mph (90.72 km/h)
65 mph (104.61 km/h)61.07 mph (98.28 km/h)
70 mph (112.65 km/h)65.77 mph (105.84 km/h)
75 mph (120.7 km/h)70.47 mph (113.4 km/h)
80 mph (128.75 km/h)75.16 mph (120.96 km/h)
85 mph (136.79 km/h)79.86 mph (128.52 km/h)
90 mph (144.84 km/h)84.56 mph (136.09 km/h)
95 mph (152.89 km/h)89.26 mph (143.65 km/h)
100 mph (160.93 km/h)93.95 mph (151.21 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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