Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/50r15 vs 195/50r15 Tire Comparison Side By Side
  205/50-15 195/50-15 Difference
Diameter inches (mm) 23.07 (586) 22.68 (576) -0.39 (-10) -1.7%
Width inches (mm) 8.07 (205) 7.68 (195) -0.39 (-10) -4.9%
Circum. inches (mm) 72.48 (1840.97) 71.24 (1809.56) -1.24 (-31.42) -1.7%
Sidewall Height inches (mm) 4.04 (102.5) 3.84 (97.5) -0.2 (-5) -4.9%
Revolutions per mile (km) 874.18 (543.19) 889.36 (552.62) 15.18 (9.43) 1.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.66 mph (31.64 km/h)
25 mph (40.23 km/h)24.57 mph (39.55 km/h)
30 mph (48.28 km/h)29.49 mph (47.46 km/h)
35 mph (56.33 km/h)34.4 mph (55.37 km/h)
40 mph (64.37 km/h)39.32 mph (63.28 km/h)
45 mph (72.42 km/h)44.23 mph (71.18 km/h)
50 mph (80.47 km/h)49.15 mph (79.09 km/h)
55 mph (88.51 km/h)54.06 mph (87 km/h)
60 mph (96.56 km/h)58.98 mph (94.91 km/h)
65 mph (104.61 km/h)63.89 mph (102.82 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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