Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/35r16 vs 225/25r17 Tire Comparison Side By Side
  215/35-16 225/25-17 Difference
Diameter inches (mm) 21.93 (556.9) 21.43 (544.3) -0.5 (-12.6) -2.3%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 68.88 (1749.55) 67.32 (1709.97) -1.56 (-39.58) -2.3%
Sidewall Height inches (mm) 2.96 (75.25) 2.21 (56.25) -0.75 (-19) -25.2%
Revolutions per mile (km) 919.86 (571.57) 941.15 (584.8) 21.29 (13.23) 2.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.55 mph (31.46 km/h)
25 mph (40.23 km/h)24.43 mph (39.32 km/h)
30 mph (48.28 km/h)29.32 mph (47.19 km/h)
35 mph (56.33 km/h)34.21 mph (55.05 km/h)
40 mph (64.37 km/h)39.09 mph (62.92 km/h)
45 mph (72.42 km/h)43.98 mph (70.78 km/h)
50 mph (80.47 km/h)48.87 mph (78.65 km/h)
55 mph (88.51 km/h)53.76 mph (86.51 km/h)
60 mph (96.56 km/h)58.64 mph (94.38 km/h)
65 mph (104.61 km/h)63.53 mph (102.24 km/h)
70 mph (112.65 km/h)68.42 mph (110.11 km/h)
75 mph (120.7 km/h)73.3 mph (117.97 km/h)
80 mph (128.75 km/h)78.19 mph (125.83 km/h)
85 mph (136.79 km/h)83.08 mph (133.7 km/h)
90 mph (144.84 km/h)87.96 mph (141.56 km/h)
95 mph (152.89 km/h)92.85 mph (149.43 km/h)
100 mph (160.93 km/h)97.74 mph (157.29 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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