Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/60r16 vs 265/70r16 Tire Comparison Side By Side
  245/60-16 265/70-16 Difference
Diameter inches (mm) 27.57 (700.4) 30.61 (777.4) 3.03 (77) 11%
Width inches (mm) 9.65 (245) 10.43 (265) 0.79 (20) 8.2%
Circum. inches (mm) 86.63 (2200.37) 96.15 (2442.27) 9.52 (241.9) 11%
Sidewall Height inches (mm) 5.79 (147) 7.3 (185.5) 1.52 (38.5) 26.2%
Revolutions per mile (km) 731.4 (454.47) 658.95 (409.45) -72.44 (-45.01) -9.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.2 mph (35.73 km/h)
25 mph (40.23 km/h)27.75 mph (44.66 km/h)
30 mph (48.28 km/h)33.3 mph (53.59 km/h)
35 mph (56.33 km/h)38.85 mph (62.52 km/h)
40 mph (64.37 km/h)44.4 mph (71.45 km/h)
45 mph (72.42 km/h)49.95 mph (80.38 km/h)
50 mph (80.47 km/h)55.5 mph (89.31 km/h)
55 mph (88.51 km/h)61.05 mph (98.25 km/h)
60 mph (96.56 km/h)66.6 mph (107.18 km/h)
65 mph (104.61 km/h)72.15 mph (116.11 km/h)
70 mph (112.65 km/h)77.7 mph (125.04 km/h)
75 mph (120.7 km/h)83.25 mph (133.97 km/h)
80 mph (128.75 km/h)88.79 mph (142.9 km/h)
85 mph (136.79 km/h)94.34 mph (151.83 km/h)
90 mph (144.84 km/h)99.89 mph (160.76 km/h)
95 mph (152.89 km/h)105.44 mph (169.7 km/h)
100 mph (160.93 km/h)110.99 mph (178.63 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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