Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/35r20 vs 295/30r20 Tire Comparison Side By Side
  295/35-20 295/30-20 Difference
Diameter inches (mm) 28.13 (714.5) 26.97 (685) -1.16 (-29.5) -4.1%
Width inches (mm) 11.61 (295) 11.61 (295) 0 (0) 0%
Circum. inches (mm) 88.37 (2244.67) 84.72 (2151.99) -3.65 (-92.68) -4.1%
Sidewall Height inches (mm) 4.06 (103.25) 3.48 (88.5) -0.58 (-14.75) -14.3%
Revolutions per mile (km) 716.96 (445.5) 747.84 (464.69) 30.88 (19.19) 4.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.17 mph (30.86 km/h)
25 mph (40.23 km/h)23.97 mph (38.57 km/h)
30 mph (48.28 km/h)28.76 mph (46.29 km/h)
35 mph (56.33 km/h)33.55 mph (54 km/h)
40 mph (64.37 km/h)38.35 mph (61.72 km/h)
45 mph (72.42 km/h)43.14 mph (69.43 km/h)
50 mph (80.47 km/h)47.94 mph (77.15 km/h)
55 mph (88.51 km/h)52.73 mph (84.86 km/h)
60 mph (96.56 km/h)57.52 mph (92.57 km/h)
65 mph (104.61 km/h)62.32 mph (100.29 km/h)
70 mph (112.65 km/h)67.11 mph (108 km/h)
75 mph (120.7 km/h)71.9 mph (115.72 km/h)
80 mph (128.75 km/h)76.7 mph (123.43 km/h)
85 mph (136.79 km/h)81.49 mph (131.15 km/h)
90 mph (144.84 km/h)86.28 mph (138.86 km/h)
95 mph (152.89 km/h)91.08 mph (146.58 km/h)
100 mph (160.93 km/h)95.87 mph (154.29 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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