Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/50r15 vs 295/65r15 Tire Comparison Side By Side
  295/50-15 295/65-15 Difference
Diameter inches (mm) 26.61 (676) 30.1 (764.5) 3.48 (88.5) 13.1%
Width inches (mm) 11.61 (295) 11.61 (295) 0 (0) 0%
Circum. inches (mm) 83.61 (2123.72) 94.56 (2401.75) 10.95 (278.03) 13.1%
Sidewall Height inches (mm) 5.81 (147.5) 7.55 (191.75) 1.74 (44.25) 30%
Revolutions per mile (km) 757.8 (470.87) 670.07 (416.36) -87.72 (-54.51) -11.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.62 mph (36.4 km/h)
25 mph (40.23 km/h)28.27 mph (45.5 km/h)
30 mph (48.28 km/h)33.93 mph (54.6 km/h)
35 mph (56.33 km/h)39.58 mph (63.7 km/h)
40 mph (64.37 km/h)45.24 mph (72.8 km/h)
45 mph (72.42 km/h)50.89 mph (81.9 km/h)
50 mph (80.47 km/h)56.55 mph (91 km/h)
55 mph (88.51 km/h)62.2 mph (100.1 km/h)
60 mph (96.56 km/h)67.86 mph (109.2 km/h)
65 mph (104.61 km/h)73.51 mph (118.3 km/h)
70 mph (112.65 km/h)79.16 mph (127.4 km/h)
75 mph (120.7 km/h)84.82 mph (136.5 km/h)
80 mph (128.75 km/h)90.47 mph (145.6 km/h)
85 mph (136.79 km/h)96.13 mph (154.7 km/h)
90 mph (144.84 km/h)101.78 mph (163.8 km/h)
95 mph (152.89 km/h)107.44 mph (172.9 km/h)
100 mph (160.93 km/h)113.09 mph (182 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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