Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/35r18 vs 295/30r18 Tire Comparison Side By Side
  295/35-18 295/30-18 Difference
Diameter inches (mm) 26.13 (663.7) 24.97 (634.2) -1.16 (-29.5) -4.4%
Width inches (mm) 11.61 (295) 11.61 (295) 0 (0) 0%
Circum. inches (mm) 82.09 (2085.08) 78.44 (1992.4) -3.65 (-92.68) -4.4%
Sidewall Height inches (mm) 4.06 (103.25) 3.48 (88.5) -0.58 (-14.75) -14.3%
Revolutions per mile (km) 771.84 (479.6) 807.74 (501.91) 35.9 (22.31) 4.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.11 mph (30.76 km/h)
25 mph (40.23 km/h)23.89 mph (38.45 km/h)
30 mph (48.28 km/h)28.67 mph (46.13 km/h)
35 mph (56.33 km/h)33.44 mph (53.82 km/h)
40 mph (64.37 km/h)38.22 mph (61.51 km/h)
45 mph (72.42 km/h)43 mph (69.2 km/h)
50 mph (80.47 km/h)47.78 mph (76.89 km/h)
55 mph (88.51 km/h)52.56 mph (84.58 km/h)
60 mph (96.56 km/h)57.33 mph (92.27 km/h)
65 mph (104.61 km/h)62.11 mph (99.96 km/h)
70 mph (112.65 km/h)66.89 mph (107.65 km/h)
75 mph (120.7 km/h)71.67 mph (115.34 km/h)
80 mph (128.75 km/h)76.44 mph (123.03 km/h)
85 mph (136.79 km/h)81.22 mph (130.71 km/h)
90 mph (144.84 km/h)86 mph (138.4 km/h)
95 mph (152.89 km/h)90.78 mph (146.09 km/h)
100 mph (160.93 km/h)95.56 mph (153.78 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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