Mike "Wuzzy121". Rest in peace, brother

Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/60r15 vs 205/55r15 Tire Comparison Side By Side
  195/60-15 205/55-15 Difference
Diameter inches (mm) 24.21 (615) 23.88 (606.5) -0.33 (-8.5) -1.4%
Width inches (mm) 7.68 (195) 8.07 (205) 0.39 (10) 5.1%
Circum. inches (mm) 76.07 (1932.08) 75.01 (1905.38) -1.05 (-26.7) -1.4%
Sidewall Height inches (mm) 4.61 (117) 4.44 (112.75) -0.17 (-4.25) -3.6%
Revolutions per mile (km) 832.96 (517.58) 844.63 (524.83) 11.67 (7.25) 1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.72 mph (31.74 km/h)
25 mph (40.23 km/h)24.65 mph (39.68 km/h)
30 mph (48.28 km/h)29.59 mph (47.61 km/h)
35 mph (56.33 km/h)34.52 mph (55.55 km/h)
40 mph (64.37 km/h)39.45 mph (63.48 km/h)
45 mph (72.42 km/h)44.38 mph (71.42 km/h)
50 mph (80.47 km/h)49.31 mph (79.36 km/h)
55 mph (88.51 km/h)54.24 mph (87.29 km/h)
60 mph (96.56 km/h)59.17 mph (95.23 km/h)
65 mph (104.61 km/h)64.1 mph (103.16 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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