Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/60r15 vs 295/60r15 Tire Comparison Side By Side
  275/60-15 295/60-15 Difference
Diameter inches (mm) 27.99 (711) 28.94 (735) 0.94 (24) 3.4%
Width inches (mm) 10.83 (275) 11.61 (295) 0.79 (20) 7.3%
Circum. inches (mm) 87.94 (2233.67) 90.91 (2309.07) 2.97 (75.4) 3.4%
Sidewall Height inches (mm) 6.5 (165) 6.97 (177) 0.47 (12) 7.3%
Revolutions per mile (km) 720.49 (447.69) 696.97 (433.07) -23.53 (-14.62) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.68 mph (33.27 km/h)
25 mph (40.23 km/h)25.84 mph (41.59 km/h)
30 mph (48.28 km/h)31.01 mph (49.91 km/h)
35 mph (56.33 km/h)36.18 mph (58.23 km/h)
40 mph (64.37 km/h)41.35 mph (66.55 km/h)
45 mph (72.42 km/h)46.52 mph (74.87 km/h)
50 mph (80.47 km/h)51.69 mph (83.18 km/h)
55 mph (88.51 km/h)56.86 mph (91.5 km/h)
60 mph (96.56 km/h)62.03 mph (99.82 km/h)
65 mph (104.61 km/h)67.19 mph (108.14 km/h)
70 mph (112.65 km/h)72.36 mph (116.46 km/h)
75 mph (120.7 km/h)77.53 mph (124.78 km/h)
80 mph (128.75 km/h)82.7 mph (133.09 km/h)
85 mph (136.79 km/h)87.87 mph (141.41 km/h)
90 mph (144.84 km/h)93.04 mph (149.73 km/h)
95 mph (152.89 km/h)98.21 mph (158.05 km/h)
100 mph (160.93 km/h)103.38 mph (166.37 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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