Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/25r24 vs 235/75r15 Tire Comparison Side By Side
  245/25-24 235/75-15 Difference
Diameter inches (mm) 28.82 (732.1) 28.88 (733.5) 0.06 (1.4) 0.2%
Width inches (mm) 9.65 (245) 9.25 (235) -0.39 (-10) -4.1%
Circum. inches (mm) 90.55 (2299.96) 90.72 (2304.36) 0.17 (4.4) 0.2%
Sidewall Height inches (mm) 2.41 (61.25) 6.94 (176.25) 4.53 (115) 187.8%
Revolutions per mile (km) 699.73 (434.79) 698.39 (433.96) -1.34 (-0.83) -0.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.04 mph (32.25 km/h)
25 mph (40.23 km/h)25.05 mph (40.31 km/h)
30 mph (48.28 km/h)30.06 mph (48.37 km/h)
35 mph (56.33 km/h)35.07 mph (56.43 km/h)
40 mph (64.37 km/h)40.08 mph (64.5 km/h)
45 mph (72.42 km/h)45.09 mph (72.56 km/h)
50 mph (80.47 km/h)50.1 mph (80.62 km/h)
55 mph (88.51 km/h)55.11 mph (88.68 km/h)
60 mph (96.56 km/h)60.11 mph (96.75 km/h)
65 mph (104.61 km/h)65.12 mph (104.81 km/h)
70 mph (112.65 km/h)70.13 mph (112.87 km/h)
75 mph (120.7 km/h)75.14 mph (120.93 km/h)
80 mph (128.75 km/h)80.15 mph (128.99 km/h)
85 mph (136.79 km/h)85.16 mph (137.06 km/h)
90 mph (144.84 km/h)90.17 mph (145.12 km/h)
95 mph (152.89 km/h)95.18 mph (153.18 km/h)
100 mph (160.93 km/h)100.19 mph (161.24 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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