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 215/70r16 Tire Comparison Side By Side
  215/65-17 215/70-16 Difference
Diameter inches (mm) 28 (711.3) 27.85 (707.4) -0.15 (-3.9) -0.5%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 87.98 (2234.61) 87.49 (2222.36) -0.48 (-12.25) -0.5%
Sidewall Height inches (mm) 5.5 (139.75) 5.93 (150.5) 0.42 (10.75) 7.7%
Revolutions per mile (km) 720.19 (447.5) 724.16 (449.97) 3.97 (2.47) 0.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.89 mph (32.01 km/h)
25 mph (40.23 km/h)24.86 mph (40.01 km/h)
30 mph (48.28 km/h)29.84 mph (48.02 km/h)
35 mph (56.33 km/h)34.81 mph (56.02 km/h)
40 mph (64.37 km/h)39.78 mph (64.02 km/h)
45 mph (72.42 km/h)44.75 mph (72.02 km/h)
50 mph (80.47 km/h)49.73 mph (80.03 km/h)
55 mph (88.51 km/h)54.7 mph (88.03 km/h)
60 mph (96.56 km/h)59.67 mph (96.03 km/h)
65 mph (104.61 km/h)64.64 mph (104.03 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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