Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/30r18 vs 265/35r18 Tire Comparison Side By Side
  295/30-18 265/35-18 Difference
Diameter inches (mm) 24.97 (634.2) 25.3 (642.7) 0.33 (8.5) 1.3%
Width inches (mm) 11.61 (295) 10.43 (265) -1.18 (-30) -10.2%
Circum. inches (mm) 78.44 (1992.4) 79.49 (2019.1) 1.05 (26.7) 1.3%
Sidewall Height inches (mm) 3.48 (88.5) 3.65 (92.75) 0.17 (4.25) 4.8%
Revolutions per mile (km) 807.74 (501.91) 797.06 (495.27) -10.68 (-6.64) -1.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.27 mph (32.62 km/h)
25 mph (40.23 km/h)25.34 mph (40.77 km/h)
30 mph (48.28 km/h)30.4 mph (48.93 km/h)
35 mph (56.33 km/h)35.47 mph (57.08 km/h)
40 mph (64.37 km/h)40.54 mph (65.24 km/h)
45 mph (72.42 km/h)45.6 mph (73.39 km/h)
50 mph (80.47 km/h)50.67 mph (81.55 km/h)
55 mph (88.51 km/h)55.74 mph (89.7 km/h)
60 mph (96.56 km/h)60.8 mph (97.86 km/h)
65 mph (104.61 km/h)65.87 mph (106.01 km/h)
70 mph (112.65 km/h)70.94 mph (114.16 km/h)
75 mph (120.7 km/h)76.01 mph (122.32 km/h)
80 mph (128.75 km/h)81.07 mph (130.47 km/h)
85 mph (136.79 km/h)86.14 mph (138.63 km/h)
90 mph (144.84 km/h)91.21 mph (146.78 km/h)
95 mph (152.89 km/h)96.27 mph (154.94 km/h)
100 mph (160.93 km/h)101.34 mph (163.09 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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