Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/35r17 vs 215/25r17 Tire Comparison Side By Side
  215/35-17 215/25-17 Difference
Diameter inches (mm) 22.93 (582.3) 21.23 (539.3) -1.69 (-43) -7.4%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 72.02 (1829.35) 66.7 (1694.26) -5.32 (-135.09) -7.4%
Sidewall Height inches (mm) 2.96 (75.25) 2.12 (53.75) -0.85 (-21.5) -28.6%
Revolutions per mile (km) 879.74 (546.64) 949.88 (590.23) 70.14 (43.59) 8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.52 mph (29.81 km/h)
25 mph (40.23 km/h)23.15 mph (37.26 km/h)
30 mph (48.28 km/h)27.78 mph (44.72 km/h)
35 mph (56.33 km/h)32.42 mph (52.17 km/h)
40 mph (64.37 km/h)37.05 mph (59.62 km/h)
45 mph (72.42 km/h)41.68 mph (67.07 km/h)
50 mph (80.47 km/h)46.31 mph (74.53 km/h)
55 mph (88.51 km/h)50.94 mph (81.98 km/h)
60 mph (96.56 km/h)55.57 mph (89.43 km/h)
65 mph (104.61 km/h)60.2 mph (96.88 km/h)
70 mph (112.65 km/h)64.83 mph (104.34 km/h)
75 mph (120.7 km/h)69.46 mph (111.79 km/h)
80 mph (128.75 km/h)74.09 mph (119.24 km/h)
85 mph (136.79 km/h)78.72 mph (126.69 km/h)
90 mph (144.84 km/h)83.35 mph (134.15 km/h)
95 mph (152.89 km/h)87.98 mph (141.6 km/h)
100 mph (160.93 km/h)92.62 mph (149.05 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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