Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/35r21 vs 295/35r21 Tire Comparison Side By Side
  275/35-21 295/35-21 Difference
Diameter inches (mm) 28.58 (725.9) 29.13 (739.9) 0.55 (14) 1.9%
Width inches (mm) 10.83 (275) 11.61 (295) 0.79 (20) 7.3%
Circum. inches (mm) 89.78 (2280.48) 91.51 (2324.46) 1.73 (43.98) 1.9%
Sidewall Height inches (mm) 3.79 (96.25) 4.06 (103.25) 0.28 (7) 7.3%
Revolutions per mile (km) 705.7 (438.5) 692.35 (430.21) -13.35 (-8.3) -1.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.39 mph (32.81 km/h)
25 mph (40.23 km/h)25.48 mph (41.01 km/h)
30 mph (48.28 km/h)30.58 mph (49.21 km/h)
35 mph (56.33 km/h)35.68 mph (57.41 km/h)
40 mph (64.37 km/h)40.77 mph (65.62 km/h)
45 mph (72.42 km/h)45.87 mph (73.82 km/h)
50 mph (80.47 km/h)50.96 mph (82.02 km/h)
55 mph (88.51 km/h)56.06 mph (90.22 km/h)
60 mph (96.56 km/h)61.16 mph (98.42 km/h)
65 mph (104.61 km/h)66.25 mph (106.63 km/h)
70 mph (112.65 km/h)71.35 mph (114.83 km/h)
75 mph (120.7 km/h)76.45 mph (123.03 km/h)
80 mph (128.75 km/h)81.54 mph (131.23 km/h)
85 mph (136.79 km/h)86.64 mph (139.43 km/h)
90 mph (144.84 km/h)91.74 mph (147.63 km/h)
95 mph (152.89 km/h)96.83 mph (155.84 km/h)
100 mph (160.93 km/h)101.93 mph (164.04 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
17622047220423022407248225642662279729323081320134193659384639664034428146265376
Better Fuel Economy Factory Ratios Increased Power

Most Popular 275/35-R21 Comparisons

To Top