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 225/25r16 Tire Comparison Side By Side
  215/35-16 225/25-16 Difference
Diameter inches (mm) 21.93 (556.9) 20.43 (518.9) -1.5 (-38) -6.8%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 68.88 (1749.55) 64.18 (1630.17) -4.7 (-119.38) -6.8%
Sidewall Height inches (mm) 2.96 (75.25) 2.21 (56.25) -0.75 (-19) -25.2%
Revolutions per mile (km) 919.86 (571.57) 987.22 (613.43) 67.36 (41.86) 7.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.64 mph (29.99 km/h)
25 mph (40.23 km/h)23.29 mph (37.49 km/h)
30 mph (48.28 km/h)27.95 mph (44.99 km/h)
35 mph (56.33 km/h)32.61 mph (52.48 km/h)
40 mph (64.37 km/h)37.27 mph (59.98 km/h)
45 mph (72.42 km/h)41.93 mph (67.48 km/h)
50 mph (80.47 km/h)46.59 mph (74.98 km/h)
55 mph (88.51 km/h)51.25 mph (82.47 km/h)
60 mph (96.56 km/h)55.91 mph (89.97 km/h)
65 mph (104.61 km/h)60.56 mph (97.47 km/h)
70 mph (112.65 km/h)65.22 mph (104.97 km/h)
75 mph (120.7 km/h)69.88 mph (112.47 km/h)
80 mph (128.75 km/h)74.54 mph (119.96 km/h)
85 mph (136.79 km/h)79.2 mph (127.46 km/h)
90 mph (144.84 km/h)83.86 mph (134.96 km/h)
95 mph (152.89 km/h)88.52 mph (142.46 km/h)
100 mph (160.93 km/h)93.18 mph (149.95 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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