Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/65r16 vs 215/70r16 Tire Comparison Side By Side
  215/65-16 215/70-16 Difference
Diameter inches (mm) 27 (685.9) 27.85 (707.4) 0.85 (21.5) 3.1%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 84.84 (2154.82) 87.49 (2222.36) 2.66 (67.54) 3.1%
Sidewall Height inches (mm) 5.5 (139.75) 5.93 (150.5) 0.42 (10.75) 7.7%
Revolutions per mile (km) 746.86 (464.08) 724.16 (449.97) -22.7 (-14.1) -3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.63 mph (33.2 km/h)
25 mph (40.23 km/h)25.78 mph (41.49 km/h)
30 mph (48.28 km/h)30.94 mph (49.79 km/h)
35 mph (56.33 km/h)36.1 mph (58.09 km/h)
40 mph (64.37 km/h)41.25 mph (66.39 km/h)
45 mph (72.42 km/h)46.41 mph (74.69 km/h)
50 mph (80.47 km/h)51.57 mph (82.99 km/h)
55 mph (88.51 km/h)56.72 mph (91.29 km/h)
60 mph (96.56 km/h)61.88 mph (99.59 km/h)
65 mph (104.61 km/h)67.04 mph (107.89 km/h)
70 mph (112.65 km/h)72.19 mph (116.19 km/h)
75 mph (120.7 km/h)77.35 mph (124.48 km/h)
80 mph (128.75 km/h)82.51 mph (132.78 km/h)
85 mph (136.79 km/h)87.66 mph (141.08 km/h)
90 mph (144.84 km/h)92.82 mph (149.38 km/h)
95 mph (152.89 km/h)97.98 mph (157.68 km/h)
100 mph (160.93 km/h)103.13 mph (165.98 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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