Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/50r15 vs 295/50r15 Tire Comparison Side By Side
  215/50-15 295/50-15 Difference
Diameter inches (mm) 23.46 (596) 26.61 (676) 3.15 (80) 13.4%
Width inches (mm) 8.46 (215) 11.61 (295) 3.15 (80) 37.2%
Circum. inches (mm) 73.72 (1872.39) 83.61 (2123.72) 9.89 (251.33) 13.4%
Sidewall Height inches (mm) 4.23 (107.5) 5.81 (147.5) 1.57 (40) 37.2%
Revolutions per mile (km) 859.51 (534.08) 757.8 (470.87) -101.72 (-63.2) -11.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.68 mph (36.51 km/h)
25 mph (40.23 km/h)28.36 mph (45.63 km/h)
30 mph (48.28 km/h)34.03 mph (54.76 km/h)
35 mph (56.33 km/h)39.7 mph (63.89 km/h)
40 mph (64.37 km/h)45.37 mph (73.01 km/h)
45 mph (72.42 km/h)51.04 mph (82.14 km/h)
50 mph (80.47 km/h)56.71 mph (91.27 km/h)
55 mph (88.51 km/h)62.38 mph (100.4 km/h)
60 mph (96.56 km/h)68.05 mph (109.52 km/h)
65 mph (104.61 km/h)73.72 mph (118.65 km/h)
70 mph (112.65 km/h)79.4 mph (127.78 km/h)
75 mph (120.7 km/h)85.07 mph (136.9 km/h)
80 mph (128.75 km/h)90.74 mph (146.03 km/h)
85 mph (136.79 km/h)96.41 mph (155.16 km/h)
90 mph (144.84 km/h)102.08 mph (164.28 km/h)
95 mph (152.89 km/h)107.75 mph (173.41 km/h)
100 mph (160.93 km/h)113.42 mph (182.54 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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