Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/35r16 vs 200/30r16 Tire Comparison Side By Side
  245/35-16 200/30-16 Difference
Diameter inches (mm) 22.75 (577.9) 20.72 (526.4) -2.03 (-51.5) -8.9%
Width inches (mm) 9.65 (245) 7.87 (200) -1.77 (-45) -18.4%
Circum. inches (mm) 71.48 (1815.53) 65.11 (1653.73) -6.37 (-161.79) -8.9%
Sidewall Height inches (mm) 3.38 (85.75) 2.36 (60) -1.01 (-25.75) -30%
Revolutions per mile (km) 886.43 (550.8) 973.16 (604.69) 86.72 (53.89) 9.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.22 mph (29.32 km/h)
25 mph (40.23 km/h)22.77 mph (36.65 km/h)
30 mph (48.28 km/h)27.33 mph (43.98 km/h)
35 mph (56.33 km/h)31.88 mph (51.31 km/h)
40 mph (64.37 km/h)36.44 mph (58.64 km/h)
45 mph (72.42 km/h)40.99 mph (65.97 km/h)
50 mph (80.47 km/h)45.54 mph (73.3 km/h)
55 mph (88.51 km/h)50.1 mph (80.63 km/h)
60 mph (96.56 km/h)54.65 mph (87.96 km/h)
65 mph (104.61 km/h)59.21 mph (95.29 km/h)
70 mph (112.65 km/h)63.76 mph (102.62 km/h)
75 mph (120.7 km/h)68.32 mph (109.94 km/h)
80 mph (128.75 km/h)72.87 mph (117.27 km/h)
85 mph (136.79 km/h)77.43 mph (124.6 km/h)
90 mph (144.84 km/h)81.98 mph (131.93 km/h)
95 mph (152.89 km/h)86.53 mph (139.26 km/h)
100 mph (160.93 km/h)91.09 mph (146.59 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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