Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/70r17 vs 265/60r17 Tire Comparison Side By Side
  255/70-17 265/60-17 Difference
Diameter inches (mm) 31.06 (788.8) 29.52 (749.8) -1.54 (-39) -4.9%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 97.56 (2478.09) 92.74 (2355.57) -4.82 (-122.52) -4.9%
Sidewall Height inches (mm) 7.03 (178.5) 6.26 (159) -0.77 (-19.5) -10.9%
Revolutions per mile (km) 649.43 (403.54) 683.21 (424.53) 33.78 (20.99) 5.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.01 mph (30.6 km/h)
25 mph (40.23 km/h)23.76 mph (38.24 km/h)
30 mph (48.28 km/h)28.52 mph (45.89 km/h)
35 mph (56.33 km/h)33.27 mph (53.54 km/h)
40 mph (64.37 km/h)38.02 mph (61.19 km/h)
45 mph (72.42 km/h)42.78 mph (68.84 km/h)
50 mph (80.47 km/h)47.53 mph (76.49 km/h)
55 mph (88.51 km/h)52.28 mph (84.14 km/h)
60 mph (96.56 km/h)57.03 mph (91.79 km/h)
65 mph (104.61 km/h)61.79 mph (99.44 km/h)
70 mph (112.65 km/h)66.54 mph (107.08 km/h)
75 mph (120.7 km/h)71.29 mph (114.73 km/h)
80 mph (128.75 km/h)76.04 mph (122.38 km/h)
85 mph (136.79 km/h)80.8 mph (130.03 km/h)
90 mph (144.84 km/h)85.55 mph (137.68 km/h)
95 mph (152.89 km/h)90.3 mph (145.33 km/h)
100 mph (160.93 km/h)95.06 mph (152.98 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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