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21 Inch Tyre Size Pressures

View front and rear 21 inch rim sized wheel tyre pressure values in PSI and BAR.

Front Tyre

front tyre

32.1 PSI

2.21 BAR

Rear Tyre

rear tyre

32.32 PSI

2.23 BAR

21 Inch Tyre Brands :

  • Anatares
  • Vredestein
  • Diehard
  • Bridgestone
  • Michelin
  • Continental
  • Achilles
  • GT Radial
  • BF Goodrich
  • Atlas
  • Aspen
  • Centara
  • Pegasus
  • Dunlop
  • Mastercraft
  • Solar
  • Primewell
  • Sumitomo
  • Nokian
  • Doral
  • Lassa
  • Petlas
  • Roadhandler
  • Blacklion
  • Ironman
  • Vogue
  • Laufenn
  • Kelly
  • Headway
  • Goodyear
  • Triangle
  • Kumho
  • WestLake
  • Nitto

Correlation Between Tyre Size And Pressure

Tyre inflation pressure is the level of air in the tyre that provides it with load-carrying capacity and affects the overall performance of the vehicle. That's because a wider car rim allows the beads of a clincher tyre to sit further apart, and as the tyre loses its bulbous shape to assume a rounded profile, there is a dramatic increase in the amount of tension on the sidewalls.

Tyre Size Chart

Finding right tyre air pressure for right tyre size :
  • 245-40-21
  • 245-45-21
  • 255-40-21
  • 255-50-21
  • 265-35-21
  • 265-40-21
  • 265-45-21
  • 275-30-21
  • 275-35-21
  • 275-45-21
  • 275-50-21
  • 285-35-21
  • 285-40-21
  • 285-45-21
  • 295-35-21
  • 295-40-21
  • 305-30-21
  • 325-30-21

How Do I Check My Tire Pressure?

  1. Purchase a tire pressure gauge.
  2. Check that your tires are "cold".
  3. Insert the tire pressure gauge into the valve stem.
  4. Note the tire pressure on the gauge and compare with the PSI number on the sticker inside your driver door.

Making sure your tires are filled to the proper level is an important part of automotive care, and it's relatively simple, too.

Types of tyre pressure gauges

As a general rule, in any specialized store we can purchase these two types of meters:

Digital

These meters incorporate an LCD screen that facilitates reading. Due to their design, they are usually very resistant to humidity and dust. However, these teams usually need batteries and that, according to data from the General Directorate of Traffic, may have a precision error of 0.3 bar.

Analogue

These types of devices tend to be bulkier and require some skill in handling, especially if they incorporate an extension hose. They usually indicate the pressure with a needle and are somewhat more precise.

PSI to BAR / BAR to PSI

Pressure Conversion Chart
BAR PSI BAR PSI BAR PSI BAR PSI BAR PSI
1.30 bar 17 psi 1.90 bar 27 psi 2.60 bar 37 psi 3.25 bar 47 psi 3.95 bar 57 psi
1.35 bar 18 psi 1.95 bar 28 psi 2.65 bar 38 psi 3.30 bar 48 psi 4.00 bar 58 psi
1.40 bar 19 psi 2.00 bar 29 psi 2.70 bar 39 psi 3.40 bar 49 psi 4.10 bar 59 psi
1.45 bar 20 psi 2.10 bar 30 psi 2.75 bar 40 psi 3.50 bar 50 psi 4.15 bar 60 psi
1.50 bar 21 psi 2.15 bar 31 psi 2.80 bar 41 psi 3.55 bar 51 psi 4.50 bar 65 psi
1.55 bar 22 psi 2.20 bar 32 psi 2.90 bar 42 psi 3.60 bar 52 psi 4.80 bar 70 psi
1.60 bar 23 psi 2.25 bar 33 psi 3.00 bar 43 psi 3.70 bar 53 psi 5.20 bar 75 psi
1.70 bar 24 psi 2.30 bar 34 psi 3.05 bar 44 psi 3.75 bar 54 psi 5.50 bar 80 psi
1.75 bar 25 psi 2.40 bar 35 psi 3.10 bar 45 psi 3.80 bar 55 psi 5.85 bar 85 psi
1.80 bar 26 psi 2.50 bar 36 psi 3.20 bar 46 psi 3.90 bar 56 psi 6.20 bar 90 psi