Using this base value and taking into consideration other factors like terrain, you can then approximate the optimal value bit by bit.Ĭaution: The limit values stated on the tyre flank must not be surpassed or undercut! tyre pressure can be increased by around 1% per KG additional weight (also for baggage) and can be relevantly reduced for less weight. The values are based on a rider with 75 kg body weight. The table contains guide values for the tyre pressure in bar for various tyre types. Guide values for specific tyre widths in mm The trick is to find exactly what that value is. The optimal pressure value is therefore somewhere between these two limit values. A pressure value above the maximum stated value, on the other hand, would stretch - and in a worst case scenario - possibly burst the tire. The rubber mantle of the tyre could be damaged if the actual tyre pressure is below the stated range, because the tyre would be subjected to excessive stresses and the flanks would crack. These values, however, are only rough guide values that should not be surpassed or undercut when riding the bike. Inscription of the minimum and maximum permissible tyre pressureĮvery bike tyre comes with an inscription of the minimum and maximum permissible tyre pressure on its flank. ✓ Less rolling resistance in rough terrain To find the correct tyre pressure, make sure to define the purpose of the tyre as precisely as possible, take note of the guide values provided and last but not least: go ahead and experiment a little. The aim when choosing tyre pressure is to minimise rolling resistance, get the best possible steering behaviour, protect the tyre against punctures and to have some degree of comfort, because after all: each tyre also has some cushioning properties. Each individual tyre type is optimised for a particular purpose. You can have tyres in a variety of diameters, with different diameters and various profiles. The answers for the pressure question that come from a tyre manufacturer can vary greatly. A rider with a very low or very high body weight will impact the tyre pressure just as much, as if the bike will have to carry additional baggage. The tyre type plays as much a role as its purpose, the type of inner tube and the terrain, on which it will be used. What tyre pressure is correct? Because of the many factors involved, this question is not easy to answer. That is why it contributes more to the driving properties of a bike than any other component. The tyre is the only area where the bike comes into contact with the road.
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