Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/55r15 vs 215/60r15 Tire Comparison Side By Side
  235/55-15 215/60-15 Difference
Diameter inches (mm) 25.18 (639.5) 25.16 (639) -0.02 (-0.5) -0.1%
Width inches (mm) 9.25 (235) 8.46 (215) -0.79 (-20) -8.5%
Circum. inches (mm) 79.1 (2009.05) 79.03 (2007.48) -0.06 (-1.57) -0.1%
Sidewall Height inches (mm) 5.09 (129.25) 5.08 (129) -0.01 (-0.25) -0.2%
Revolutions per mile (km) 801.05 (497.75) 801.67 (498.14) 0.63 (0.39) 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 (40.2 km/h)
30 mph (48.28 km/h)29.98 mph (48.24 km/h)
35 mph (56.33 km/h)34.97 mph (56.28 km/h)
40 mph (64.37 km/h)39.97 mph (64.32 km/h)
45 mph (72.42 km/h)44.96 mph (72.36 km/h)
50 mph (80.47 km/h)49.96 mph (80.4 km/h)
55 mph (88.51 km/h)54.96 mph (88.44 km/h)
60 mph (96.56 km/h)59.95 mph (96.49 km/h)
65 mph (104.61 km/h)64.95 mph (104.53 km/h)
70 mph (112.65 km/h)69.95 mph (112.57 km/h)
75 mph (120.7 km/h)74.94 mph (120.61 km/h)
80 mph (128.75 km/h)79.94 mph (128.65 km/h)
85 mph (136.79 km/h)84.93 mph (136.69 km/h)
90 mph (144.84 km/h)89.93 mph (144.73 km/h)
95 mph (152.89 km/h)94.93 mph (152.77 km/h)
100 mph (160.93 km/h)99.92 mph (160.81 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
20402370255226652787287429693082323833943568370739594236445445924671495753566225
Better Fuel Economy Factory Ratios Increased Power

Most Popular 235/55-R15 Comparisons

To Top