Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
305/40r23 vs 35/9.5r17 Tire Comparison Side By Side
  305/40-23 35/9.5-17 Difference
Diameter inches (mm) 32.61 (828.2) 35.03 (889.7) 2.42 (61.5) 7.4%
Width inches (mm) 12.01 (305) 9.49 (241) -2.52 (-64) -21%
Circum. inches (mm) 102.44 (2601.87) 110.04 (2795.07) 7.61 (193.21) 7.4%
Sidewall Height inches (mm) 4.8 (122) 9.01 (228.95) 4.21 (106.95) 87.7%
Revolutions per mile (km) 618.53 (384.34) 575.78 (357.77) -42.76 (-26.57) -6.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.49 mph (34.58 km/h)
25 mph (40.23 km/h)26.86 mph (43.22 km/h)
30 mph (48.28 km/h)32.23 mph (51.87 km/h)
35 mph (56.33 km/h)37.6 mph (60.51 km/h)
40 mph (64.37 km/h)42.97 mph (69.15 km/h)
45 mph (72.42 km/h)48.34 mph (77.8 km/h)
50 mph (80.47 km/h)53.71 mph (86.44 km/h)
55 mph (88.51 km/h)59.08 mph (95.09 km/h)
60 mph (96.56 km/h)64.46 mph (103.73 km/h)
65 mph (104.61 km/h)69.83 mph (112.38 km/h)
70 mph (112.65 km/h)75.2 mph (121.02 km/h)
75 mph (120.7 km/h)80.57 mph (129.66 km/h)
80 mph (128.75 km/h)85.94 mph (138.31 km/h)
85 mph (136.79 km/h)91.31 mph (146.95 km/h)
90 mph (144.84 km/h)96.68 mph (155.6 km/h)
95 mph (152.89 km/h)102.05 mph (164.24 km/h)
100 mph (160.93 km/h)107.43 mph (172.89 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
14651702183319142001206421322213232624382563266228433043319932983354356038474471
Better Fuel Economy Factory Ratios Increased Power

Most Popular 305/40-R23 Comparisons

To Top