Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/75r17 vs 35/13.5r17 Tire Comparison Side By Side
  215/75-17 35/13.5-17 Difference
Diameter inches (mm) 29.7 (754.3) 35.1 (891.42) 5.4 (137.12) 18.2%
Width inches (mm) 8.46 (215) 13.5 (343) 5.04 (128) 59.5%
Circum. inches (mm) 93.3 (2369.7) 110.26 (2800.48) 16.96 (430.78) 18.2%
Sidewall Height inches (mm) 6.35 (161.25) 9.05 (229.81) 2.7 (68.56) 42.5%
Revolutions per mile (km) 679.13 (421.99) 574.67 (357.08) -104.47 (-64.91) -15.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.64 mph (38.04 km/h)
25 mph (40.23 km/h)29.54 mph (47.55 km/h)
30 mph (48.28 km/h)35.45 mph (57.06 km/h)
35 mph (56.33 km/h)41.36 mph (66.57 km/h)
40 mph (64.37 km/h)47.27 mph (76.08 km/h)
45 mph (72.42 km/h)53.18 mph (85.59 km/h)
50 mph (80.47 km/h)59.09 mph (95.1 km/h)
55 mph (88.51 km/h)65 mph (104.6 km/h)
60 mph (96.56 km/h)70.91 mph (114.11 km/h)
65 mph (104.61 km/h)76.82 mph (123.62 km/h)
70 mph (112.65 km/h)82.72 mph (133.13 km/h)
75 mph (120.7 km/h)88.63 mph (142.64 km/h)
80 mph (128.75 km/h)94.54 mph (152.15 km/h)
85 mph (136.79 km/h)100.45 mph (161.66 km/h)
90 mph (144.84 km/h)106.36 mph (171.17 km/h)
95 mph (152.89 km/h)112.27 mph (180.68 km/h)
100 mph (160.93 km/h)118.18 mph (190.19 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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