Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/75r17 vs 215/70r17.5 Tire Comparison Side By Side
  215/75-17 215/70-17.5 Difference
Diameter inches (mm) 29.7 (754.3) 29.35 (745.5) -0.35 (-8.8) -1.2%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 93.3 (2369.7) 92.21 (2342.06) -1.09 (-27.65) -1.2%
Sidewall Height inches (mm) 6.35 (161.25) 5.93 (150.5) -0.42 (-10.75) -6.7%
Revolutions per mile (km) 679.13 (421.99) 687.15 (426.97) 8.02 (4.98) 1.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.77 mph (31.81 km/h)
25 mph (40.23 km/h)24.71 mph (39.76 km/h)
30 mph (48.28 km/h)29.65 mph (47.72 km/h)
35 mph (56.33 km/h)34.59 mph (55.67 km/h)
40 mph (64.37 km/h)39.53 mph (63.62 km/h)
45 mph (72.42 km/h)44.48 mph (71.58 km/h)
50 mph (80.47 km/h)49.42 mph (79.53 km/h)
55 mph (88.51 km/h)54.36 mph (87.48 km/h)
60 mph (96.56 km/h)59.3 mph (95.43 km/h)
65 mph (104.61 km/h)64.24 mph (103.39 km/h)
70 mph (112.65 km/h)69.18 mph (111.34 km/h)
75 mph (120.7 km/h)74.13 mph (119.29 km/h)
80 mph (128.75 km/h)79.07 mph (127.25 km/h)
85 mph (136.79 km/h)84.01 mph (135.2 km/h)
90 mph (144.84 km/h)88.95 mph (143.15 km/h)
95 mph (152.89 km/h)93.89 mph (151.1 km/h)
100 mph (160.93 km/h)98.83 mph (159.06 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
17492031218822842389246325452642277629093058317733933631381739364003424945915335
Better Fuel Economy Factory Ratios Increased Power

Most Popular 215/75-R17 Comparisons

To Top