Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/60r17 vs 275/55r17 Tire Comparison Side By Side
  245/60-17 275/55-17 Difference
Diameter inches (mm) 28.57 (725.8) 28.91 (734.3) 0.33 (8.5) 1.2%
Width inches (mm) 9.65 (245) 10.83 (275) 1.18 (30) 12.2%
Circum. inches (mm) 89.77 (2280.17) 90.82 (2306.87) 1.05 (26.7) 1.2%
Sidewall Height inches (mm) 5.79 (147) 5.95 (151.25) 0.17 (4.25) 2.9%
Revolutions per mile (km) 705.8 (438.56) 697.63 (433.49) -8.17 (-5.08) -1.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.23 mph (32.56 km/h)
25 mph (40.23 km/h)25.29 mph (40.7 km/h)
30 mph (48.28 km/h)30.35 mph (48.85 km/h)
35 mph (56.33 km/h)35.41 mph (56.99 km/h)
40 mph (64.37 km/h)40.47 mph (65.13 km/h)
45 mph (72.42 km/h)45.53 mph (73.27 km/h)
50 mph (80.47 km/h)50.59 mph (81.41 km/h)
55 mph (88.51 km/h)55.64 mph (89.55 km/h)
60 mph (96.56 km/h)60.7 mph (97.69 km/h)
65 mph (104.61 km/h)65.76 mph (105.83 km/h)
70 mph (112.65 km/h)70.82 mph (113.97 km/h)
75 mph (120.7 km/h)75.88 mph (122.11 km/h)
80 mph (128.75 km/h)80.94 mph (130.26 km/h)
85 mph (136.79 km/h)86 mph (138.4 km/h)
90 mph (144.84 km/h)91.05 mph (146.54 km/h)
95 mph (152.89 km/h)96.11 mph (154.68 km/h)
100 mph (160.93 km/h)101.17 mph (162.82 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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