Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/60r15 vs 295/50r15 Tire Comparison Side By Side
  235/60-15 295/50-15 Difference
Diameter inches (mm) 26.1 (663) 26.61 (676) 0.51 (13) 2%
Width inches (mm) 9.25 (235) 11.61 (295) 2.36 (60) 25.5%
Circum. inches (mm) 82 (2082.88) 83.61 (2123.72) 1.61 (40.84) 2%
Sidewall Height inches (mm) 5.55 (141) 5.81 (147.5) 0.26 (6.5) 4.6%
Revolutions per mile (km) 772.65 (480.1) 757.8 (470.87) -14.86 (-9.23) -1.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.39 mph (32.82 km/h)
25 mph (40.23 km/h)25.49 mph (41.02 km/h)
30 mph (48.28 km/h)30.59 mph (49.23 km/h)
35 mph (56.33 km/h)35.69 mph (57.43 km/h)
40 mph (64.37 km/h)40.78 mph (65.64 km/h)
45 mph (72.42 km/h)45.88 mph (73.84 km/h)
50 mph (80.47 km/h)50.98 mph (82.05 km/h)
55 mph (88.51 km/h)56.08 mph (90.25 km/h)
60 mph (96.56 km/h)61.18 mph (98.45 km/h)
65 mph (104.61 km/h)66.27 mph (106.66 km/h)
70 mph (112.65 km/h)71.37 mph (114.86 km/h)
75 mph (120.7 km/h)76.47 mph (123.07 km/h)
80 mph (128.75 km/h)81.57 mph (131.27 km/h)
85 mph (136.79 km/h)86.67 mph (139.48 km/h)
90 mph (144.84 km/h)91.76 mph (147.68 km/h)
95 mph (152.89 km/h)96.86 mph (155.89 km/h)
100 mph (160.93 km/h)101.96 mph (164.09 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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