Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/50r19 vs 215/55r17 Tire Comparison Side By Side
  235/50-19 215/55-17 Difference
Diameter inches (mm) 28.25 (717.6) 26.31 (668.3) -1.94 (-49.3) -6.9%
Width inches (mm) 9.25 (235) 8.46 (215) -0.79 (-20) -8.5%
Circum. inches (mm) 88.76 (2254.41) 82.66 (2099.53) -6.1 (-154.88) -6.9%
Sidewall Height inches (mm) 4.63 (117.5) 4.66 (118.25) 0.03 (0.75) 0.6%
Revolutions per mile (km) 713.87 (443.57) 766.53 (476.3) 52.66 (32.72) 7.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.63 mph (29.98 km/h)
25 mph (40.23 km/h)23.28 mph (37.47 km/h)
30 mph (48.28 km/h)27.94 mph (44.96 km/h)
35 mph (56.33 km/h)32.6 mph (52.46 km/h)
40 mph (64.37 km/h)37.25 mph (59.95 km/h)
45 mph (72.42 km/h)41.91 mph (67.45 km/h)
50 mph (80.47 km/h)46.56 mph (74.94 km/h)
55 mph (88.51 km/h)51.22 mph (82.43 km/h)
60 mph (96.56 km/h)55.88 mph (89.93 km/h)
65 mph (104.61 km/h)60.53 mph (97.42 km/h)
70 mph (112.65 km/h)65.19 mph (104.91 km/h)
75 mph (120.7 km/h)69.85 mph (112.41 km/h)
80 mph (128.75 km/h)74.5 mph (119.9 km/h)
85 mph (136.79 km/h)79.16 mph (127.4 km/h)
90 mph (144.84 km/h)83.82 mph (134.89 km/h)
95 mph (152.89 km/h)88.47 mph (142.38 km/h)
100 mph (160.93 km/h)93.13 mph (149.88 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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