Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/70r17 vs 215/60r17 Tire Comparison Side By Side
  215/70-17 215/60-17 Difference
Diameter inches (mm) 28.85 (732.8) 27.16 (689.8) -1.69 (-43) -5.9%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 90.64 (2302.16) 85.32 (2167.07) -5.32 (-135.09) -5.9%
Sidewall Height inches (mm) 5.93 (150.5) 5.08 (129) -0.85 (-21.5) -14.3%
Revolutions per mile (km) 699.06 (434.37) 742.64 (461.45) 43.58 (27.08) 6.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.83 mph (30.3 km/h)
25 mph (40.23 km/h)23.53 mph (37.87 km/h)
30 mph (48.28 km/h)28.24 mph (45.45 km/h)
35 mph (56.33 km/h)32.95 mph (53.02 km/h)
40 mph (64.37 km/h)37.65 mph (60.6 km/h)
45 mph (72.42 km/h)42.36 mph (68.17 km/h)
50 mph (80.47 km/h)47.07 mph (75.75 km/h)
55 mph (88.51 km/h)51.77 mph (83.32 km/h)
60 mph (96.56 km/h)56.48 mph (90.89 km/h)
65 mph (104.61 km/h)61.19 mph (98.47 km/h)
70 mph (112.65 km/h)65.89 mph (106.04 km/h)
75 mph (120.7 km/h)70.6 mph (113.62 km/h)
80 mph (128.75 km/h)75.31 mph (121.19 km/h)
85 mph (136.79 km/h)80.01 mph (128.77 km/h)
90 mph (144.84 km/h)84.72 mph (136.34 km/h)
95 mph (152.89 km/h)89.43 mph (143.92 km/h)
100 mph (160.93 km/h)94.13 mph (151.49 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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