Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/60r15 vs 215/60r16 Tire Comparison Side By Side
  195/60-15 215/60-16 Difference
Diameter inches (mm) 24.21 (615) 26.16 (664.4) 1.94 (49.4) 8%
Width inches (mm) 7.68 (195) 8.46 (215) 0.79 (20) 10.3%
Circum. inches (mm) 76.07 (1932.08) 82.18 (2087.27) 6.11 (155.19) 8%
Sidewall Height inches (mm) 4.61 (117) 5.08 (129) 0.47 (12) 10.3%
Revolutions per mile (km) 832.96 (517.58) 771.03 (479.09) -61.93 (-38.48) -7.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.61 mph (34.77 km/h)
25 mph (40.23 km/h)27.01 mph (43.47 km/h)
30 mph (48.28 km/h)32.41 mph (52.16 km/h)
35 mph (56.33 km/h)37.81 mph (60.85 km/h)
40 mph (64.37 km/h)43.21 mph (69.54 km/h)
45 mph (72.42 km/h)48.61 mph (78.24 km/h)
50 mph (80.47 km/h)54.02 mph (86.93 km/h)
55 mph (88.51 km/h)59.42 mph (95.62 km/h)
60 mph (96.56 km/h)64.82 mph (104.32 km/h)
65 mph (104.61 km/h)70.22 mph (113.01 km/h)
70 mph (112.65 km/h)75.62 mph (121.7 km/h)
75 mph (120.7 km/h)81.02 mph (130.4 km/h)
80 mph (128.75 km/h)86.43 mph (139.09 km/h)
85 mph (136.79 km/h)91.83 mph (147.78 km/h)
90 mph (144.84 km/h)97.23 mph (156.48 km/h)
95 mph (152.89 km/h)102.63 mph (165.17 km/h)
100 mph (160.93 km/h)108.03 mph (173.86 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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