Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
345/35r15 vs 295/50r15 Tire Comparison Side By Side
  345/35-15 295/50-15 Difference
Diameter inches (mm) 24.51 (622.5) 26.61 (676) 2.11 (53.5) 8.6%
Width inches (mm) 13.58 (345) 11.61 (295) -1.97 (-50) -14.5%
Circum. inches (mm) 76.99 (1955.64) 83.61 (2123.72) 6.62 (168.08) 8.6%
Sidewall Height inches (mm) 4.75 (120.75) 5.81 (147.5) 1.05 (26.75) 22.2%
Revolutions per mile (km) 822.92 (511.34) 757.8 (470.87) -65.13 (-40.47) -7.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.72 mph (34.95 km/h)
25 mph (40.23 km/h)27.15 mph (43.69 km/h)
30 mph (48.28 km/h)32.58 mph (52.43 km/h)
35 mph (56.33 km/h)38.01 mph (61.17 km/h)
40 mph (64.37 km/h)43.44 mph (69.91 km/h)
45 mph (72.42 km/h)48.87 mph (78.64 km/h)
50 mph (80.47 km/h)54.3 mph (87.38 km/h)
55 mph (88.51 km/h)59.73 mph (96.12 km/h)
60 mph (96.56 km/h)65.16 mph (104.86 km/h)
65 mph (104.61 km/h)70.59 mph (113.6 km/h)
70 mph (112.65 km/h)76.02 mph (122.34 km/h)
75 mph (120.7 km/h)81.45 mph (131.07 km/h)
80 mph (128.75 km/h)86.88 mph (139.81 km/h)
85 mph (136.79 km/h)92.31 mph (148.55 km/h)
90 mph (144.84 km/h)97.73 mph (157.29 km/h)
95 mph (152.89 km/h)103.16 mph (166.03 km/h)
100 mph (160.93 km/h)108.59 mph (174.77 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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