Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
115/70r16 vs 125/70r16 Tire Comparison Side By Side
  115/70-16 125/70-16 Difference
Diameter inches (mm) 22.34 (567.4) 22.89 (581.4) 0.55 (14) 2.5%
Width inches (mm) 4.53 (115) 4.92 (125) 0.39 (10) 8.7%
Circum. inches (mm) 70.18 (1782.54) 71.91 (1826.52) 1.73 (43.98) 2.5%
Sidewall Height inches (mm) 3.17 (80.5) 3.44 (87.5) 0.28 (7) 8.7%
Revolutions per mile (km) 902.84 (561) 881.1 (547.49) -21.74 (-13.51) -2.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.49 mph (32.98 km/h)
25 mph (40.23 km/h)25.62 mph (41.23 km/h)
30 mph (48.28 km/h)30.74 mph (49.47 km/h)
35 mph (56.33 km/h)35.86 mph (57.72 km/h)
40 mph (64.37 km/h)40.99 mph (65.96 km/h)
45 mph (72.42 km/h)46.11 mph (74.21 km/h)
50 mph (80.47 km/h)51.23 mph (82.45 km/h)
55 mph (88.51 km/h)56.36 mph (90.7 km/h)
60 mph (96.56 km/h)61.48 mph (98.94 km/h)
65 mph (104.61 km/h)66.6 mph (107.19 km/h)
70 mph (112.65 km/h)71.73 mph (115.43 km/h)
75 mph (120.7 km/h)76.85 mph (123.68 km/h)
80 mph (128.75 km/h)81.97 mph (131.92 km/h)
85 mph (136.79 km/h)87.1 mph (140.17 km/h)
90 mph (144.84 km/h)92.22 mph (148.42 km/h)
95 mph (152.89 km/h)97.34 mph (156.66 km/h)
100 mph (160.93 km/h)102.47 mph (164.91 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
22422605280529293063315832633387355937313922407443514656489550475133544858876841
Better Fuel Economy Factory Ratios Increased Power

Most Popular 115/70-R16 Comparisons

To Top