Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/45r15 vs 295/65r15 Tire Comparison Side By Side
  295/45-15 295/65-15 Difference
Diameter inches (mm) 25.45 (646.5) 30.1 (764.5) 4.65 (118) 18.3%
Width inches (mm) 11.61 (295) 11.61 (295) 0 (0) 0%
Circum. inches (mm) 79.96 (2031.04) 94.56 (2401.75) 14.59 (370.71) 18.3%
Sidewall Height inches (mm) 5.23 (132.75) 7.55 (191.75) 2.32 (59) 44.4%
Revolutions per mile (km) 792.37 (492.36) 670.07 (416.36) -122.3 (-76) -15.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.65 mph (38.06 km/h)
25 mph (40.23 km/h)29.56 mph (47.58 km/h)
30 mph (48.28 km/h)35.48 mph (57.09 km/h)
35 mph (56.33 km/h)41.39 mph (66.61 km/h)
40 mph (64.37 km/h)47.3 mph (76.12 km/h)
45 mph (72.42 km/h)53.21 mph (85.64 km/h)
50 mph (80.47 km/h)59.13 mph (95.15 km/h)
55 mph (88.51 km/h)65.04 mph (104.67 km/h)
60 mph (96.56 km/h)70.95 mph (114.19 km/h)
65 mph (104.61 km/h)76.86 mph (123.7 km/h)
70 mph (112.65 km/h)82.78 mph (133.22 km/h)
75 mph (120.7 km/h)88.69 mph (142.73 km/h)
80 mph (128.75 km/h)94.6 mph (152.25 km/h)
85 mph (136.79 km/h)100.51 mph (161.76 km/h)
90 mph (144.84 km/h)106.43 mph (171.28 km/h)
95 mph (152.89 km/h)112.34 mph (180.79 km/h)
100 mph (160.93 km/h)118.25 mph (190.31 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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