Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/65r15 vs 195/55r16 Tire Comparison Side By Side
  185/65-15 195/55-16 Difference
Diameter inches (mm) 24.47 (621.5) 24.44 (620.9) -0.02 (-0.6) -0.1%
Width inches (mm) 7.28 (185) 7.68 (195) 0.39 (10) 5.4%
Circum. inches (mm) 76.87 (1952.5) 76.8 (1950.61) -0.07 (-1.88) -0.1%
Sidewall Height inches (mm) 4.73 (120.25) 4.22 (107.25) -0.51 (-13) -10.8%
Revolutions per mile (km) 824.25 (512.16) 825.04 (512.66) 0.8 (0.49) 0.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.98 mph (32.16 km/h)
25 mph (40.23 km/h)24.98 mph (40.19 km/h)
30 mph (48.28 km/h)29.97 mph (48.23 km/h)
35 mph (56.33 km/h)34.97 mph (56.27 km/h)
40 mph (64.37 km/h)39.96 mph (64.31 km/h)
45 mph (72.42 km/h)44.96 mph (72.35 km/h)
50 mph (80.47 km/h)49.95 mph (80.39 km/h)
55 mph (88.51 km/h)54.95 mph (88.43 km/h)
60 mph (96.56 km/h)59.94 mph (96.47 km/h)
65 mph (104.61 km/h)64.94 mph (104.51 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
21002439262727432868295730563172333334933672381540744360458347264807510255136406
Better Fuel Economy Factory Ratios Increased Power

Most Popular 185/65-R15 Comparisons

To Top