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 215/40r17 Tire Comparison Side By Side
  215/35-17 215/40-17 Difference
Diameter inches (mm) 22.93 (582.3) 23.77 (603.8) 0.85 (21.5) 3.7%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 72.02 (1829.35) 74.68 (1896.89) 2.66 (67.54) 3.7%
Sidewall Height inches (mm) 2.96 (75.25) 3.39 (86) 0.42 (10.75) 14.3%
Revolutions per mile (km) 879.74 (546.64) 848.41 (527.18) -31.33 (-19.46) -3.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.74 mph (33.38 km/h)
25 mph (40.23 km/h)25.92 mph (41.72 km/h)
30 mph (48.28 km/h)31.11 mph (50.06 km/h)
35 mph (56.33 km/h)36.29 mph (58.41 km/h)
40 mph (64.37 km/h)41.48 mph (66.75 km/h)
45 mph (72.42 km/h)46.66 mph (75.09 km/h)
50 mph (80.47 km/h)51.85 mph (83.44 km/h)
55 mph (88.51 km/h)57.03 mph (91.78 km/h)
60 mph (96.56 km/h)62.22 mph (100.13 km/h)
65 mph (104.61 km/h)67.4 mph (108.47 km/h)
70 mph (112.65 km/h)72.58 mph (116.81 km/h)
75 mph (120.7 km/h)77.77 mph (125.16 km/h)
80 mph (128.75 km/h)82.95 mph (133.5 km/h)
85 mph (136.79 km/h)88.14 mph (141.85 km/h)
90 mph (144.84 km/h)93.32 mph (150.19 km/h)
95 mph (152.89 km/h)98.51 mph (158.53 km/h)
100 mph (160.93 km/h)103.69 mph (166.88 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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