Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
150/75r16 vs 225/75r16 Tire Comparison Side By Side
  150/75-16 225/75-16 Difference
Diameter inches (mm) 24.86 (631.4) 29.29 (743.9) 4.43 (112.5) 17.8%
Width inches (mm) 5.91 (150) 8.86 (225) 2.95 (75) 50%
Circum. inches (mm) 78.09 (1983.6) 92.01 (2337.03) 13.91 (353.43) 17.8%
Sidewall Height inches (mm) 4.43 (112.5) 6.64 (168.75) 2.21 (56.25) 50%
Revolutions per mile (km) 811.32 (504.13) 688.63 (427.89) -122.7 (-76.24) -15.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.56 mph (37.92 km/h)
25 mph (40.23 km/h)29.45 mph (47.4 km/h)
30 mph (48.28 km/h)35.35 mph (56.88 km/h)
35 mph (56.33 km/h)41.24 mph (66.36 km/h)
40 mph (64.37 km/h)47.13 mph (75.84 km/h)
45 mph (72.42 km/h)53.02 mph (85.32 km/h)
50 mph (80.47 km/h)58.91 mph (94.8 km/h)
55 mph (88.51 km/h)64.8 mph (104.29 km/h)
60 mph (96.56 km/h)70.69 mph (113.77 km/h)
65 mph (104.61 km/h)76.58 mph (123.25 km/h)
70 mph (112.65 km/h)82.47 mph (132.73 km/h)
75 mph (120.7 km/h)88.36 mph (142.21 km/h)
80 mph (128.75 km/h)94.25 mph (151.69 km/h)
85 mph (136.79 km/h)100.14 mph (161.17 km/h)
90 mph (144.84 km/h)106.04 mph (170.65 km/h)
95 mph (152.89 km/h)111.93 mph (180.13 km/h)
100 mph (160.93 km/h)117.82 mph (189.61 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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