Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/60r16 vs 235/60r16 Tire Comparison Side By Side
  255/60-16 235/60-16 Difference
Diameter inches (mm) 28.05 (712.4) 27.1 (688.4) -0.94 (-24) -3.4%
Width inches (mm) 10.04 (255) 9.25 (235) -0.79 (-20) -7.8%
Circum. inches (mm) 88.11 (2238.07) 85.14 (2162.67) -2.97 (-75.4) -3.4%
Sidewall Height inches (mm) 6.02 (153) 5.55 (141) -0.47 (-12) -7.8%
Revolutions per mile (km) 719.08 (446.81) 744.15 (462.39) 25.07 (15.58) 3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.33 mph (31.1 km/h)
25 mph (40.23 km/h)24.16 mph (38.88 km/h)
30 mph (48.28 km/h)28.99 mph (46.65 km/h)
35 mph (56.33 km/h)33.82 mph (54.43 km/h)
40 mph (64.37 km/h)38.65 mph (62.21 km/h)
45 mph (72.42 km/h)43.48 mph (69.98 km/h)
50 mph (80.47 km/h)48.32 mph (77.76 km/h)
55 mph (88.51 km/h)53.15 mph (85.53 km/h)
60 mph (96.56 km/h)57.98 mph (93.31 km/h)
65 mph (104.61 km/h)62.81 mph (101.08 km/h)
70 mph (112.65 km/h)67.64 mph (108.86 km/h)
75 mph (120.7 km/h)72.47 mph (116.63 km/h)
80 mph (128.75 km/h)77.3 mph (124.41 km/h)
85 mph (136.79 km/h)82.14 mph (132.19 km/h)
90 mph (144.84 km/h)86.97 mph (139.96 km/h)
95 mph (152.89 km/h)91.8 mph (147.74 km/h)
100 mph (160.93 km/h)96.63 mph (155.51 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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