Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/65r15 vs 215/50r17 Tire Comparison Side By Side
  205/65-15 215/50-17 Difference
Diameter inches (mm) 25.49 (647.5) 25.46 (646.8) -0.03 (-0.7) -0.1%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 80.09 (2034.18) 80 (2031.98) -0.09 (-2.2) -0.1%
Sidewall Height inches (mm) 5.25 (133.25) 4.23 (107.5) -1.01 (-25.75) -19.3%
Revolutions per mile (km) 791.15 (491.6) 792.01 (492.13) 0.86 (0.53) 0.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.98 mph (32.15 km/h)
25 mph (40.23 km/h)24.97 mph (40.19 km/h)
30 mph (48.28 km/h)29.97 mph (48.23 km/h)
35 mph (56.33 km/h)34.96 mph (56.27 km/h)
40 mph (64.37 km/h)39.96 mph (64.3 km/h)
45 mph (72.42 km/h)44.95 mph (72.34 km/h)
50 mph (80.47 km/h)49.95 mph (80.38 km/h)
55 mph (88.51 km/h)54.94 mph (88.42 km/h)
60 mph (96.56 km/h)59.94 mph (96.46 km/h)
65 mph (104.61 km/h)64.93 mph (104.49 km/h)
70 mph (112.65 km/h)69.92 mph (112.53 km/h)
75 mph (120.7 km/h)74.92 mph (120.57 km/h)
80 mph (128.75 km/h)79.91 mph (128.61 km/h)
85 mph (136.79 km/h)84.91 mph (136.65 km/h)
90 mph (144.84 km/h)89.9 mph (144.68 km/h)
95 mph (152.89 km/h)94.9 mph (152.72 km/h)
100 mph (160.93 km/h)99.89 mph (160.76 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
20162341252226332753283929333045319933533525366239114185440045374614489752926149
Better Fuel Economy Factory Ratios Increased Power

Most Popular 205/65-R15 Comparisons

To Top