Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
35/12.5r20 vs 285/60r20 Tire Comparison Side By Side
  35/12.5-20 285/60-20 Difference
Diameter inches (mm) 35.02 (889.6) 33.46 (850) -1.56 (-39.6) -4.5%
Width inches (mm) 12.52 (318) 11.22 (285) -1.3 (-33) -10.4%
Circum. inches (mm) 110.03 (2794.76) 105.13 (2670.35) -4.9 (-124.41) -4.5%
Sidewall Height inches (mm) 7.51 (190.8) 6.73 (171) -0.78 (-19.8) -10.4%
Revolutions per mile (km) 575.84 (357.81) 602.67 (374.48) 26.83 (16.67) 4.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.11 mph (30.75 km/h)
25 mph (40.23 km/h)23.89 mph (38.44 km/h)
30 mph (48.28 km/h)28.66 mph (46.13 km/h)
35 mph (56.33 km/h)33.44 mph (53.82 km/h)
40 mph (64.37 km/h)38.22 mph (61.51 km/h)
45 mph (72.42 km/h)43 mph (69.2 km/h)
50 mph (80.47 km/h)47.77 mph (76.89 km/h)
55 mph (88.51 km/h)52.55 mph (84.57 km/h)
60 mph (96.56 km/h)57.33 mph (92.26 km/h)
65 mph (104.61 km/h)62.11 mph (99.95 km/h)
70 mph (112.65 km/h)66.88 mph (107.64 km/h)
75 mph (120.7 km/h)71.66 mph (115.33 km/h)
80 mph (128.75 km/h)76.44 mph (123.02 km/h)
85 mph (136.79 km/h)81.22 mph (130.71 km/h)
90 mph (144.84 km/h)85.99 mph (138.39 km/h)
95 mph (152.89 km/h)90.77 mph (146.08 km/h)
100 mph (160.93 km/h)95.55 mph (153.77 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
15341782191920042095216022322317243425522682278729763185334834523511372740274679
Better Fuel Economy Factory Ratios Increased Power

Most Popular 35/12.5-R20 Comparisons

To Top