Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/60r17 vs 235/60r17 Tire Comparison Side By Side
  265/60-17 235/60-17 Difference
Diameter inches (mm) 29.52 (749.8) 28.1 (713.8) -1.42 (-36) -4.8%
Width inches (mm) 10.43 (265) 9.25 (235) -1.18 (-30) -11.3%
Circum. inches (mm) 92.74 (2355.57) 88.29 (2242.47) -4.45 (-113.1) -4.8%
Sidewall Height inches (mm) 6.26 (159) 5.55 (141) -0.71 (-18) -11.3%
Revolutions per mile (km) 683.21 (424.53) 717.67 (445.94) 34.46 (21.41) 5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.04 mph (30.64 km/h)
25 mph (40.23 km/h)23.8 mph (38.3 km/h)
30 mph (48.28 km/h)28.56 mph (45.96 km/h)
35 mph (56.33 km/h)33.32 mph (53.62 km/h)
40 mph (64.37 km/h)38.08 mph (61.28 km/h)
45 mph (72.42 km/h)42.84 mph (68.94 km/h)
50 mph (80.47 km/h)47.6 mph (76.6 km/h)
55 mph (88.51 km/h)52.36 mph (84.26 km/h)
60 mph (96.56 km/h)57.12 mph (91.92 km/h)
65 mph (104.61 km/h)61.88 mph (99.59 km/h)
70 mph (112.65 km/h)66.64 mph (107.25 km/h)
75 mph (120.7 km/h)71.4 mph (114.91 km/h)
80 mph (128.75 km/h)76.16 mph (122.57 km/h)
85 mph (136.79 km/h)80.92 mph (130.23 km/h)
90 mph (144.84 km/h)85.68 mph (137.89 km/h)
95 mph (152.89 km/h)90.44 mph (145.55 km/h)
100 mph (160.93 km/h)95.2 mph (153.21 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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