Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/35r16 vs 215/85r16 Tire Comparison Side By Side
  215/35-16 215/85-16 Difference
Diameter inches (mm) 21.93 (556.9) 30.39 (771.9) 8.46 (215) 38.6%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 68.88 (1749.55) 95.47 (2425) 26.59 (675.44) 38.6%
Sidewall Height inches (mm) 2.96 (75.25) 7.19 (182.75) 4.23 (107.5) 142.9%
Revolutions per mile (km) 919.86 (571.57) 663.65 (412.37) -256.21 (-159.2) -27.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)27.72 mph (44.61 km/h)
25 mph (40.23 km/h)34.65 mph (55.77 km/h)
30 mph (48.28 km/h)41.58 mph (66.92 km/h)
35 mph (56.33 km/h)48.51 mph (78.07 km/h)
40 mph (64.37 km/h)55.44 mph (89.23 km/h)
45 mph (72.42 km/h)62.37 mph (100.38 km/h)
50 mph (80.47 km/h)69.3 mph (111.53 km/h)
55 mph (88.51 km/h)76.23 mph (122.69 km/h)
60 mph (96.56 km/h)83.16 mph (133.84 km/h)
65 mph (104.61 km/h)90.09 mph (144.99 km/h)
70 mph (112.65 km/h)97.02 mph (156.15 km/h)
75 mph (120.7 km/h)103.95 mph (167.3 km/h)
80 mph (128.75 km/h)110.89 mph (178.45 km/h)
85 mph (136.79 km/h)117.82 mph (189.61 km/h)
90 mph (144.84 km/h)124.75 mph (200.76 km/h)
95 mph (152.89 km/h)131.68 mph (211.91 km/h)
100 mph (160.93 km/h)138.61 mph (223.07 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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