Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/60r16 vs 215/65r15 Tire Comparison Side By Side
  215/60-16 215/65-15 Difference
Diameter inches (mm) 26.16 (664.4) 26 (660.5) -0.15 (-3.9) -0.6%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 82.18 (2087.27) 81.69 (2075.02) -0.48 (-12.25) -0.6%
Sidewall Height inches (mm) 5.08 (129) 5.5 (139.75) 0.42 (10.75) 8.3%
Revolutions per mile (km) 771.03 (479.09) 775.58 (481.92) 4.55 (2.83) 0.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.88 mph (32 km/h)
25 mph (40.23 km/h)24.85 mph (40 km/h)
30 mph (48.28 km/h)29.82 mph (48 km/h)
35 mph (56.33 km/h)34.79 mph (56 km/h)
40 mph (64.37 km/h)39.77 mph (64 km/h)
45 mph (72.42 km/h)44.74 mph (72 km/h)
50 mph (80.47 km/h)49.71 mph (80 km/h)
55 mph (88.51 km/h)54.68 mph (87.99 km/h)
60 mph (96.56 km/h)59.65 mph (95.99 km/h)
65 mph (104.61 km/h)64.62 mph (103.99 km/h)
70 mph (112.65 km/h)69.59 mph (111.99 km/h)
75 mph (120.7 km/h)74.56 mph (119.99 km/h)
80 mph (128.75 km/h)79.53 mph (127.99 km/h)
85 mph (136.79 km/h)84.5 mph (135.99 km/h)
90 mph (144.84 km/h)89.47 mph (143.99 km/h)
95 mph (152.89 km/h)94.44 mph (151.99 km/h)
100 mph (160.93 km/h)99.41 mph (159.99 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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