Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/25r20 vs 295/35r20 Tire Comparison Side By Side
  295/25-20 295/35-20 Difference
Diameter inches (mm) 25.81 (655.5) 28.13 (714.5) 2.32 (59) 9%
Width inches (mm) 11.61 (295) 11.61 (295) 0 (0) 0%
Circum. inches (mm) 81.08 (2059.31) 88.37 (2244.67) 7.3 (185.35) 9%
Sidewall Height inches (mm) 2.9 (73.75) 4.06 (103.25) 1.16 (29.5) 40%
Revolutions per mile (km) 781.5 (485.6) 716.96 (445.5) -64.53 (-40.1) -8.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.8 mph (35.08 km/h)
25 mph (40.23 km/h)27.25 mph (43.86 km/h)
30 mph (48.28 km/h)32.7 mph (52.63 km/h)
35 mph (56.33 km/h)38.15 mph (61.4 km/h)
40 mph (64.37 km/h)43.6 mph (70.17 km/h)
45 mph (72.42 km/h)49.05 mph (78.94 km/h)
50 mph (80.47 km/h)54.5 mph (87.71 km/h)
55 mph (88.51 km/h)59.95 mph (96.48 km/h)
60 mph (96.56 km/h)65.4 mph (105.25 km/h)
65 mph (104.61 km/h)70.85 mph (114.02 km/h)
70 mph (112.65 km/h)76.3 mph (122.79 km/h)
75 mph (120.7 km/h)81.75 mph (131.57 km/h)
80 mph (128.75 km/h)87.2 mph (140.34 km/h)
85 mph (136.79 km/h)92.65 mph (149.11 km/h)
90 mph (144.84 km/h)98.1 mph (157.88 km/h)
95 mph (152.89 km/h)103.55 mph (166.65 km/h)
100 mph (160.93 km/h)109 mph (175.42 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
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