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 35/11.5r17 Tire Comparison Side By Side
  215/75-17 35/11.5-17 Difference
Diameter inches (mm) 29.7 (754.3) 34.93 (887.32) 5.24 (133.02) 17.6%
Width inches (mm) 8.46 (215) 11.5 (292) 3.03 (77) 35.8%
Circum. inches (mm) 93.3 (2369.7) 109.75 (2787.6) 16.45 (417.89) 17.6%
Sidewall Height inches (mm) 6.35 (161.25) 8.97 (227.76) 2.62 (66.51) 41.2%
Revolutions per mile (km) 679.13 (421.99) 577.32 (358.73) -101.81 (-63.26) -15%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.53 mph (37.86 km/h)
25 mph (40.23 km/h)29.41 mph (47.33 km/h)
30 mph (48.28 km/h)35.29 mph (56.79 km/h)
35 mph (56.33 km/h)41.17 mph (66.26 km/h)
40 mph (64.37 km/h)47.05 mph (75.73 km/h)
45 mph (72.42 km/h)52.94 mph (85.19 km/h)
50 mph (80.47 km/h)58.82 mph (94.66 km/h)
55 mph (88.51 km/h)64.7 mph (104.12 km/h)
60 mph (96.56 km/h)70.58 mph (113.59 km/h)
65 mph (104.61 km/h)76.46 mph (123.05 km/h)
70 mph (112.65 km/h)82.34 mph (132.52 km/h)
75 mph (120.7 km/h)88.23 mph (141.99 km/h)
80 mph (128.75 km/h)94.11 mph (151.45 km/h)
85 mph (136.79 km/h)99.99 mph (160.92 km/h)
90 mph (144.84 km/h)105.87 mph (170.38 km/h)
95 mph (152.89 km/h)111.75 mph (179.85 km/h)
100 mph (160.93 km/h)117.63 mph (189.32 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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