Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/75r15 vs 215/60r16 Tire Comparison Side By Side
  215/75-15 215/60-16 Difference
Diameter inches (mm) 27.7 (703.5) 26.16 (664.4) -1.54 (-39.1) -5.6%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 87.01 (2210.11) 82.18 (2087.27) -4.84 (-122.84) -5.6%
Sidewall Height inches (mm) 6.35 (161.25) 5.08 (129) -1.27 (-32.25) -20%
Revolutions per mile (km) 728.17 (452.47) 771.03 (479.09) 42.85 (26.63) 5.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.89 mph (30.4 km/h)
25 mph (40.23 km/h)23.61 mph (38 km/h)
30 mph (48.28 km/h)28.33 mph (45.6 km/h)
35 mph (56.33 km/h)33.05 mph (53.2 km/h)
40 mph (64.37 km/h)37.78 mph (60.8 km/h)
45 mph (72.42 km/h)42.5 mph (68.4 km/h)
50 mph (80.47 km/h)47.22 mph (76 km/h)
55 mph (88.51 km/h)51.94 mph (83.59 km/h)
60 mph (96.56 km/h)56.67 mph (91.19 km/h)
65 mph (104.61 km/h)61.39 mph (98.79 km/h)
70 mph (112.65 km/h)66.11 mph (106.39 km/h)
75 mph (120.7 km/h)70.83 mph (113.99 km/h)
80 mph (128.75 km/h)75.55 mph (121.59 km/h)
85 mph (136.79 km/h)80.28 mph (129.19 km/h)
90 mph (144.84 km/h)85 mph (136.79 km/h)
95 mph (152.89 km/h)89.72 mph (144.39 km/h)
100 mph (160.93 km/h)94.44 mph (151.99 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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