Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/35r15 vs 295/50r15 Tire Comparison Side By Side
  275/35-15 295/50-15 Difference
Diameter inches (mm) 22.58 (573.5) 26.61 (676) 4.04 (102.5) 17.9%
Width inches (mm) 10.83 (275) 11.61 (295) 0.79 (20) 7.3%
Circum. inches (mm) 70.93 (1801.7) 83.61 (2123.72) 12.68 (322.01) 17.9%
Sidewall Height inches (mm) 3.79 (96.25) 5.81 (147.5) 2.02 (51.25) 53.2%
Revolutions per mile (km) 893.23 (555.03) 757.8 (470.87) -135.44 (-84.16) -15.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.57 mph (37.94 km/h)
25 mph (40.23 km/h)29.47 mph (47.42 km/h)
30 mph (48.28 km/h)35.36 mph (56.91 km/h)
35 mph (56.33 km/h)41.26 mph (66.39 km/h)
40 mph (64.37 km/h)47.15 mph (75.88 km/h)
45 mph (72.42 km/h)53.04 mph (85.36 km/h)
50 mph (80.47 km/h)58.94 mph (94.85 km/h)
55 mph (88.51 km/h)64.83 mph (104.33 km/h)
60 mph (96.56 km/h)70.72 mph (113.82 km/h)
65 mph (104.61 km/h)76.62 mph (123.3 km/h)
70 mph (112.65 km/h)82.51 mph (132.79 km/h)
75 mph (120.7 km/h)88.4 mph (142.27 km/h)
80 mph (128.75 km/h)94.3 mph (151.76 km/h)
85 mph (136.79 km/h)100.19 mph (161.24 km/h)
90 mph (144.84 km/h)106.09 mph (170.73 km/h)
95 mph (152.89 km/h)111.98 mph (180.21 km/h)
100 mph (160.93 km/h)117.87 mph (189.7 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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