Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/55r15 vs 235/60r15 Tire Comparison Side By Side
  295/55-15 235/60-15 Difference
Diameter inches (mm) 27.78 (705.5) 26.1 (663) -1.67 (-42.5) -6%
Width inches (mm) 11.61 (295) 9.25 (235) -2.36 (-60) -20.3%
Circum. inches (mm) 87.26 (2216.39) 82 (2082.88) -5.26 (-133.52) -6%
Sidewall Height inches (mm) 6.39 (162.25) 5.55 (141) -0.84 (-21.25) -13.1%
Revolutions per mile (km) 726.11 (451.18) 772.65 (480.1) 46.55 (28.92) 6.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.8 mph (30.25 km/h)
25 mph (40.23 km/h)23.49 mph (37.81 km/h)
30 mph (48.28 km/h)28.19 mph (45.37 km/h)
35 mph (56.33 km/h)32.89 mph (52.93 km/h)
40 mph (64.37 km/h)37.59 mph (60.5 km/h)
45 mph (72.42 km/h)42.29 mph (68.06 km/h)
50 mph (80.47 km/h)46.99 mph (75.62 km/h)
55 mph (88.51 km/h)51.69 mph (83.18 km/h)
60 mph (96.56 km/h)56.39 mph (90.74 km/h)
65 mph (104.61 km/h)61.08 mph (98.31 km/h)
70 mph (112.65 km/h)65.78 mph (105.87 km/h)
75 mph (120.7 km/h)70.48 mph (113.43 km/h)
80 mph (128.75 km/h)75.18 mph (120.99 km/h)
85 mph (136.79 km/h)79.88 mph (128.55 km/h)
90 mph (144.84 km/h)84.58 mph (136.12 km/h)
95 mph (152.89 km/h)89.28 mph (143.68 km/h)
100 mph (160.93 km/h)93.98 mph (151.24 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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