Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r16 vs 335/30r20 Tire Comparison Side By Side
  265/70-16 335/30-20 Difference
Diameter inches (mm) 30.61 (777.4) 27.91 (709) -2.69 (-68.4) -8.8%
Width inches (mm) 10.43 (265) 13.19 (335) 2.76 (70) 26.4%
Circum. inches (mm) 96.15 (2442.27) 87.69 (2227.39) -8.46 (-214.88) -8.8%
Sidewall Height inches (mm) 7.3 (185.5) 3.96 (100.5) -3.35 (-85) -45.8%
Revolutions per mile (km) 658.95 (409.45) 722.52 (448.96) 63.57 (39.5) 9.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.24 mph (29.35 km/h)
25 mph (40.23 km/h)22.8 mph (36.69 km/h)
30 mph (48.28 km/h)27.36 mph (44.03 km/h)
35 mph (56.33 km/h)31.92 mph (51.37 km/h)
40 mph (64.37 km/h)36.48 mph (58.71 km/h)
45 mph (72.42 km/h)41.04 mph (66.05 km/h)
50 mph (80.47 km/h)45.6 mph (73.39 km/h)
55 mph (88.51 km/h)50.16 mph (80.73 km/h)
60 mph (96.56 km/h)54.72 mph (88.06 km/h)
65 mph (104.61 km/h)59.28 mph (95.4 km/h)
70 mph (112.65 km/h)63.84 mph (102.74 km/h)
75 mph (120.7 km/h)68.4 mph (110.08 km/h)
80 mph (128.75 km/h)72.96 mph (117.42 km/h)
85 mph (136.79 km/h)77.52 mph (124.76 km/h)
90 mph (144.84 km/h)82.08 mph (132.1 km/h)
95 mph (152.89 km/h)86.64 mph (139.44 km/h)
100 mph (160.93 km/h)91.2 mph (146.77 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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