Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/60r17 vs 285/70r17 Tire Comparison Side By Side
  265/60-17 285/70-17 Difference
Diameter inches (mm) 29.52 (749.8) 32.71 (830.8) 3.19 (81) 10.8%
Width inches (mm) 10.43 (265) 11.22 (285) 0.79 (20) 7.5%
Circum. inches (mm) 92.74 (2355.57) 102.76 (2610.04) 10.02 (254.47) 10.8%
Sidewall Height inches (mm) 6.26 (159) 7.85 (199.5) 1.59 (40.5) 25.5%
Revolutions per mile (km) 683.21 (424.53) 616.6 (383.14) -66.61 (-41.39) -9.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.16 mph (35.66 km/h)
25 mph (40.23 km/h)27.7 mph (44.58 km/h)
30 mph (48.28 km/h)33.24 mph (53.5 km/h)
35 mph (56.33 km/h)38.78 mph (62.41 km/h)
40 mph (64.37 km/h)44.32 mph (71.33 km/h)
45 mph (72.42 km/h)49.86 mph (80.24 km/h)
50 mph (80.47 km/h)55.4 mph (89.16 km/h)
55 mph (88.51 km/h)60.94 mph (98.08 km/h)
60 mph (96.56 km/h)66.48 mph (106.99 km/h)
65 mph (104.61 km/h)72.02 mph (115.91 km/h)
70 mph (112.65 km/h)77.56 mph (124.82 km/h)
75 mph (120.7 km/h)83.1 mph (133.74 km/h)
80 mph (128.75 km/h)88.64 mph (142.66 km/h)
85 mph (136.79 km/h)94.18 mph (151.57 km/h)
90 mph (144.84 km/h)99.72 mph (160.49 km/h)
95 mph (152.89 km/h)105.26 mph (169.4 km/h)
100 mph (160.93 km/h)110.8 mph (178.32 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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