Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/75r15 vs 275/60r15 Tire Comparison Side By Side
  295/75-15 275/60-15 Difference
Diameter inches (mm) 32.42 (823.5) 27.99 (711) -4.43 (-112.5) -13.7%
Width inches (mm) 11.61 (295) 10.83 (275) -0.79 (-20) -6.8%
Circum. inches (mm) 101.85 (2587.1) 87.94 (2233.67) -13.91 (-353.43) -13.7%
Sidewall Height inches (mm) 8.71 (221.25) 6.5 (165) -2.21 (-56.25) -25.4%
Revolutions per mile (km) 622.06 (386.53) 720.49 (447.69) 98.43 (61.16) 15.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.27 mph (27.79 km/h)
25 mph (40.23 km/h)21.58 mph (34.74 km/h)
30 mph (48.28 km/h)25.9 mph (41.68 km/h)
35 mph (56.33 km/h)30.22 mph (48.63 km/h)
40 mph (64.37 km/h)34.54 mph (55.58 km/h)
45 mph (72.42 km/h)38.85 mph (62.53 km/h)
50 mph (80.47 km/h)43.17 mph (69.47 km/h)
55 mph (88.51 km/h)47.49 mph (76.42 km/h)
60 mph (96.56 km/h)51.8 mph (83.37 km/h)
65 mph (104.61 km/h)56.12 mph (90.32 km/h)
70 mph (112.65 km/h)60.44 mph (97.26 km/h)
75 mph (120.7 km/h)64.75 mph (104.21 km/h)
80 mph (128.75 km/h)69.07 mph (111.16 km/h)
85 mph (136.79 km/h)73.39 mph (118.11 km/h)
90 mph (144.84 km/h)77.7 mph (125.05 km/h)
95 mph (152.89 km/h)82.02 mph (132 km/h)
100 mph (160.93 km/h)86.34 mph (138.95 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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