The following tables contain indicative values in bar and psi for tire inflation. These values are based on a rider with a body weight of 75 kg. For each additional kilogram of weight (including luggage), the pressure can be increased by 1%, and decreased in the same proportions if the weight is reduced. Starting from this initial value, you can get closer and closer to the optimum pressure by taking other factors, such as terrain, into account.
GUIDE VALUES FOR CERTAIN TYRE WIDTHS IN MM
| TYRE WIDTH (MM) | ATMOSPHERIC PRESSURE (BAR) |
|---|---|
| 20 mm | 9,0 bar |
| 23 mm | 8,0 bar |
| 25 mm | 7,0 bar |
| 28 mm | 6,0 bar |
| 30 mm | 5,5 bar |
| 32 mm | 5,0 bar |
| 35 mm | 4,5 bar |
| 37 mm | 4,5 bar |
| 40 mm | 4,0 bar |
| 42 mm | 4,0 bar |
| 44 mm | 3,5 bar |
| 47 mm | 3,5 bar |
| 50 mm | 3,0 bar |
| 54 mm | 2,5 bar |
| 57 mm | 2,2 bar |
| 60 mm | 2,0 bar |
GUIDE VALUES FOR CERTAIN TIRE WIDTHS IN INCHES
| TYRE WIDTH (INCHES) | ATMOSPHERIC PRESSURE (BAR) | PRESSURE ON BIS AND PSI |
|---|---|---|
| 24 x 1.5 pouce | 2.5 - 3.5 bar | 36 bis 51 psi |
| 24 x 1.625 pouce | 2.5 - 2.5 bar | 36 bis 36 psi |
| 24 x 1.75 pouce | 2.0 - 3.0 bar | 29 bis 44 psi |
| 24 x 1.85 pouce | 2.0 - 3.0 bar | 29 bis 44 psi |
| 24 x 1.90 pouce | 2.0 - 3.0 bar | 29 bis 44 psi |
| 24 x 2 pouce | 2.0 - 3.0 bar | 29 bis 44 psi |
| 24 x 2.1 pouce | 2.0 - 3.0 bar | 29 bis 44 psi |
| 24 x 2.125 pouce | 2.0 - 3.0 bar | 29 bis 44 psi |
| 26 x 0.90 pouce | 4.5 - 5.5 bar | 65 bis 80 psi |
| 26 x 1 pouce | 4.0 - 5.0 bar | 58 bis 73 psi |
| 26 x 1.1 pouce | 3.5 - 4.5 bar | 51 bis 65 psi |
| 26 x 1.2 pouce | 3.0 - 4.0 bar | 44 bis 58 psi |
| 26 x 1.25 pouce | 2.5 - 3.5 bar | 36 bis 51 psi |
| 26 x 1.35 pouce | 2.5 - 3.5 bar | 36 bis 51 psi |
| 26 x 1.4 pouce | 2.5 - 3.5 bar | 36 bis 51 psi |
| 26 x 1.5 pouce | 2.5 - 3.5 bar | 36 bis 51 psi |
| 26 x 1.6 pouce | 2.2 - 3.5 bar | 32 bis 51 psi |
| 26 x 1.625 pouce | 2.2 - 3.0 bar | 32 bis 44 psi |
| 26 x 1.75 pouce | 2.2 - 3.0 bar | 32 bis 44 psi |
| 26 x 1.8 pouce | 2.2 - 3.0 bar | 32 bis 44 psi |
| 26 x 1.85 pouce | 2.2 - 3.0 bar | 32 bis 44 psi |
| 26 x 1.9 pouce | 2.0 - 3.0 bar | 29 bis 44 psi |
| 26 x 1.95 pouce | 2.0 - 2.5 bar | 29 bis 36 psi |
| 26 x 2 pouce | 1.8 - 2.2 bar | 26 bis 32 psi |
| 26 x 2.1 pouce | 1.8 - 2.2 bar | 26 bis 32 psi |
| 26 x 2.125 pouce | 1.8 - 2.2 bar | 26 bis 32 psi |
| 26 x 2.25 pouce | 1.8 - 2.2 bar | 26 bis 32 psi |
| 26 x 2.35 pouce | 1.8 - 2.2 bar | 26 bis 32 psi |
| 26 x 2.4 pouce | 1.8 - 2.2 bar | 26 bis 32 psi |
| 26 x 2.5 pouce | 1.6 - 2.2 bar | 23 bis 32 psi |
| 26 x 2.75 pouce | 1.6 - 2.0 bar | 23 bis 29 psi |
| 26 x 3 pouce | 1.6 - 2.0 bar | 23 bis 29 psi |
| 27.5 x 1.35 pouce | 2.8 - 5.0 bar | 41 bis 73 psi |
| 27.5 x 1.4 pouce | 2.5 - 5.0 bar | 36 bis 73 psi |
| 27.5 x 1.5 pouce | 2.5 - 4.0 bar | 36 bis 58 psi |
| 27.5 x 1.6 pouce | 2.2 - 3.5 bar | 32 bis 51 psi |
| 27.5 x 1.65 pouce | 2.2 - 3.0 bar | 32 bis 44 psi |
| 27.5 x 1.75 pouce | 2.2 - 3.0 bar | 32 bis 44 psi |
| 27.5 x 2 pouce | 2.0 - 3.0 bar | 29 bis 44 psi |
| 27.5 x 2.1 pouce | 2.0 - 2.5 bar | 29 bis 36 psi |
| 27.5 x 2.25 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 27.5 x 2.35 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 27.5 x 2.4 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 27.5 x 2.6 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 27.5 x 2.75 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 27.5 x 2.9 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 27.5 x 3 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 28 x 0.9 pouce | 4.5 - 5.5 bar | 65 bis 80 psi |
| 28 x 1 pouce | 4.0 - 5.0 bar | 58 bis 73 psi |
| 28 x 1.1 pouce | 3.5 - 4.5 bar | 51 bis 65 psi |
| 28 x 1.2 pouce | 3.5 - 4.5 bar | 51 bis 65 psi |
| 28 x 1.25 pouce | 2.5 - 4.0 bar | 36 bis 58 psi |
| 28 x 1.3 pouce | 2.5 - 3.5 bar | 36 bis 51 psi |
| 28 x 1.35 pouce | 2.5 - 3.5 bar | 36 bis 51 psi |
| 28 x 1.4 pouce | 2.5 - 3.5 bar | 36 bis 51 psi |
| 28 x 1.5 pouce | 2.5 - 3.5 bar | 36 bis 51 psi |
| 28 x 1.6 pouce | 2.2 - 3.0 bar | 32 bis 44 psi |
| 28 x 1.625 pouce | 2.2 - 3.0 bar | 32 bis 44 psi |
| 28 x 1.75 pouce | 2.2 - 3.0 bar | 32 bis 44 psi |
| 28 x 1.9 pouce | 2.0 - 3.0 bar | 29 bis 44 psi |
| 28 x 1.95 pouce | 2.0 - 2.5 bar | 29 bis 36 psi |
| 28 x 2 pouce | 2.0 - 2.5 bar | 29 bis 36 psi |
| 28 x 2.15 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 28 x 2.35 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 29 x 2 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 29 x 2.1 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 29 x 2.15 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 29 x 2.25 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
| 29 x 2.35 pouce | 1.8 - 2.5 bar | 26 bis 36 psi |
WHY THE RIGHT PRESSURE IS SO IMPORTANT
Tyres are the only part of a road contact bike. That’s why the bike’s handling depends more on the tyres than anything else. But what is the right tyre pressure? The answer to this question is anything but simple, for a number of reasons. The type of tyre is just as important as its use, the choice of tube and where it is driven. The rider’s weight, light or heavy, also affects tire pressure; this is also the case when, for example, another load has to be loaded. Tire manufacturers’ answers to the question of pressure vary widely. There are different diameters, different cross-sections and different tyre profiles. What’s more, each tyre is optimized for a specific application.
When you’re looking for the right pressure, you need to keep in mind reducing rolling resistance, getting the best control, protecting the tyre from breaking and achieving a level of comfort, because ultimately every tyre also has factors that – heat. If you want to check the correct pressure, you need to specify the exact material used, based on a few guidelines and, above all, test many different pressures.
GUIDE VALUES FOR OPTIMUM TIRE PRESSURE
Tyre sidewall markings every bicycle tyre has a sidewall marking indicating the minimum and maximum permissible pressure. However, these are only general guidelines below or above which tyres should not be used. If the actual tyre pressure is lower than the values indicated, the rubber may be damaged due to excessive pressure, while tears may appear in the corner. On the other hand, higher pressures can damage the tyre and, in the worst case, cause it to explode. The optimum pressure therefore lies between two critical values. All we have to do is find it.