Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/65r16 vs 265/75r16 Tire Comparison Side By Side
  215/65-16 265/75-16 Difference
Diameter inches (mm) 27 (685.9) 31.65 (803.9) 4.65 (118) 17.2%
Width inches (mm) 8.46 (215) 10.43 (265) 1.97 (50) 23.3%
Circum. inches (mm) 84.84 (2154.82) 99.43 (2525.53) 14.59 (370.71) 17.2%
Sidewall Height inches (mm) 5.5 (139.75) 7.82 (198.75) 2.32 (59) 42.2%
Revolutions per mile (km) 746.86 (464.08) 637.23 (395.96) -109.63 (-68.12) -14.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.44 mph (37.72 km/h)
25 mph (40.23 km/h)29.3 mph (47.16 km/h)
30 mph (48.28 km/h)35.16 mph (56.59 km/h)
35 mph (56.33 km/h)41.02 mph (66.02 km/h)
40 mph (64.37 km/h)46.88 mph (75.45 km/h)
45 mph (72.42 km/h)52.74 mph (84.88 km/h)
50 mph (80.47 km/h)58.6 mph (94.31 km/h)
55 mph (88.51 km/h)64.46 mph (103.74 km/h)
60 mph (96.56 km/h)70.32 mph (113.17 km/h)
65 mph (104.61 km/h)76.18 mph (122.6 km/h)
70 mph (112.65 km/h)82.04 mph (132.03 km/h)
75 mph (120.7 km/h)87.9 mph (141.47 km/h)
80 mph (128.75 km/h)93.76 mph (150.9 km/h)
85 mph (136.79 km/h)99.62 mph (160.33 km/h)
90 mph (144.84 km/h)105.48 mph (169.76 km/h)
95 mph (152.89 km/h)111.34 mph (179.19 km/h)
100 mph (160.93 km/h)117.2 mph (188.62 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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