Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
200/70r15 vs 33/12.5r16 Tire Comparison Side By Side
  200/70-15 33/12.5-16 Difference
Diameter inches (mm) 26.02 (661) 33.03 (838.88) 7 (177.88) 26.9%
Width inches (mm) 7.87 (200) 12.52 (318) 4.65 (118) 59%
Circum. inches (mm) 81.76 (2076.59) 103.76 (2635.42) 22 (558.83) 26.9%
Sidewall Height inches (mm) 5.51 (140) 8.51 (216.24) 3 (76.24) 54.5%
Revolutions per mile (km) 774.99 (481.56) 610.66 (379.45) -164.33 (-102.11) -21.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)25.38 mph (40.85 km/h)
25 mph (40.23 km/h)31.73 mph (51.06 km/h)
30 mph (48.28 km/h)38.07 mph (61.27 km/h)
35 mph (56.33 km/h)44.42 mph (71.49 km/h)
40 mph (64.37 km/h)50.76 mph (81.7 km/h)
45 mph (72.42 km/h)57.11 mph (91.91 km/h)
50 mph (80.47 km/h)63.46 mph (102.12 km/h)
55 mph (88.51 km/h)69.8 mph (112.33 km/h)
60 mph (96.56 km/h)76.15 mph (122.55 km/h)
65 mph (104.61 km/h)82.49 mph (132.76 km/h)
70 mph (112.65 km/h)88.84 mph (142.97 km/h)
75 mph (120.7 km/h)95.18 mph (153.18 km/h)
80 mph (128.75 km/h)101.53 mph (163.39 km/h)
85 mph (136.79 km/h)107.87 mph (173.61 km/h)
90 mph (144.84 km/h)114.22 mph (183.82 km/h)
95 mph (152.89 km/h)120.57 mph (194.03 km/h)
100 mph (160.93 km/h)126.91 mph (204.24 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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