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 225/75r16 Tire Comparison Side By Side
  215/35-16 225/75-16 Difference
Diameter inches (mm) 21.93 (556.9) 29.29 (743.9) 7.36 (187) 33.6%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 68.88 (1749.55) 92.01 (2337.03) 23.13 (587.48) 33.6%
Sidewall Height inches (mm) 2.96 (75.25) 6.64 (168.75) 3.68 (93.5) 124.3%
Revolutions per mile (km) 919.86 (571.57) 688.63 (427.89) -231.23 (-143.68) -25.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)26.72 mph (42.99 km/h)
25 mph (40.23 km/h)33.39 mph (53.74 km/h)
30 mph (48.28 km/h)40.07 mph (64.49 km/h)
35 mph (56.33 km/h)46.75 mph (75.24 km/h)
40 mph (64.37 km/h)53.43 mph (85.99 km/h)
45 mph (72.42 km/h)60.11 mph (96.74 km/h)
50 mph (80.47 km/h)66.79 mph (107.49 km/h)
55 mph (88.51 km/h)73.47 mph (118.24 km/h)
60 mph (96.56 km/h)80.15 mph (128.98 km/h)
65 mph (104.61 km/h)86.83 mph (139.73 km/h)
70 mph (112.65 km/h)93.51 mph (150.48 km/h)
75 mph (120.7 km/h)100.18 mph (161.23 km/h)
80 mph (128.75 km/h)106.86 mph (171.98 km/h)
85 mph (136.79 km/h)113.54 mph (182.73 km/h)
90 mph (144.84 km/h)120.22 mph (193.48 km/h)
95 mph (152.89 km/h)126.9 mph (204.23 km/h)
100 mph (160.93 km/h)133.58 mph (214.97 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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