Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/30r20 vs 305/35r20 Tire Comparison Side By Side
  295/30-20 305/35-20 Difference
Diameter inches (mm) 26.97 (685) 28.41 (721.5) 1.44 (36.5) 5.3%
Width inches (mm) 11.61 (295) 12.01 (305) 0.39 (10) 3.4%
Circum. inches (mm) 84.72 (2151.99) 89.24 (2266.66) 4.51 (114.67) 5.3%
Sidewall Height inches (mm) 3.48 (88.5) 4.2 (106.75) 0.72 (18.25) 20.6%
Revolutions per mile (km) 747.84 (464.69) 710.01 (441.18) -37.83 (-23.51) -5.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.07 mph (33.9 km/h)
25 mph (40.23 km/h)26.33 mph (42.38 km/h)
30 mph (48.28 km/h)31.6 mph (50.85 km/h)
35 mph (56.33 km/h)36.86 mph (59.33 km/h)
40 mph (64.37 km/h)42.13 mph (67.8 km/h)
45 mph (72.42 km/h)47.4 mph (76.28 km/h)
50 mph (80.47 km/h)52.66 mph (84.76 km/h)
55 mph (88.51 km/h)57.93 mph (93.23 km/h)
60 mph (96.56 km/h)63.2 mph (101.71 km/h)
65 mph (104.61 km/h)68.46 mph (110.18 km/h)
70 mph (112.65 km/h)73.73 mph (118.66 km/h)
75 mph (120.7 km/h)79 mph (127.13 km/h)
80 mph (128.75 km/h)84.26 mph (135.61 km/h)
85 mph (136.79 km/h)89.53 mph (144.08 km/h)
90 mph (144.84 km/h)94.8 mph (152.56 km/h)
95 mph (152.89 km/h)100.06 mph (161.03 km/h)
100 mph (160.93 km/h)105.33 mph (169.51 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
18072099226023602468254526302729286830063160328335063752394440674136439047445513
Better Fuel Economy Factory Ratios Increased Power

Most Popular 295/30-R20 Comparisons

To Top