Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
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295/65r15 vs 275/60r15 Tire Comparison Side By Side
  295/65-15 275/60-15 Difference
Diameter inches (mm) 30.1 (764.5) 27.99 (711) -2.11 (-53.5) -7%
Width inches (mm) 11.61 (295) 10.83 (275) -0.79 (-20) -6.8%
Circum. inches (mm) 94.56 (2401.75) 87.94 (2233.67) -6.62 (-168.08) -7%
Sidewall Height inches (mm) 7.55 (191.75) 6.5 (165) -1.05 (-26.75) -14%
Revolutions per mile (km) 670.07 (416.36) 720.49 (447.69) 50.42 (31.33) 7.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.6 mph (29.93 km/h)
25 mph (40.23 km/h)23.25 mph (37.42 km/h)
30 mph (48.28 km/h)27.9 mph (44.9 km/h)
35 mph (56.33 km/h)32.55 mph (52.39 km/h)
40 mph (64.37 km/h)37.2 mph (59.87 km/h)
45 mph (72.42 km/h)41.85 mph (67.35 km/h)
50 mph (80.47 km/h)46.5 mph (74.84 km/h)
55 mph (88.51 km/h)51.15 mph (82.32 km/h)
60 mph (96.56 km/h)55.8 mph (89.8 km/h)
65 mph (104.61 km/h)60.45 mph (97.29 km/h)
70 mph (112.65 km/h)65.1 mph (104.77 km/h)
75 mph (120.7 km/h)69.75 mph (112.25 km/h)
80 mph (128.75 km/h)74.4 mph (119.74 km/h)
85 mph (136.79 km/h)79.05 mph (127.22 km/h)
90 mph (144.84 km/h)83.7 mph (134.71 km/h)
95 mph (152.89 km/h)88.35 mph (142.19 km/h)
100 mph (160.93 km/h)93 mph (149.67 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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