Wear and tear of tyres

When this past August we were in Germany for the "Fendt Field Day 2018" we got very impressed by the machine they had shown to make the parallel of the tires in tractors... something very similar that is done daily in cars. After talking with our friend José Miñarro (from ATG Tire - Alliance), he explained us some concepts that we are summarizing below and that are always very useful when you want to care tractor tires. 

Many times we see how the front wheels of our tractors do not wear evenly and one part of the cue wastes faster than another. The causes that originate this wear are multiple and diverse but we can be sure that the reason is not the lack quality of the tire. It is not possible to manufacture a tyre with one part softer than the other because the rubber of the tread is completely homogeneous and has the same hardness in all the blocks and in all its extension. So, what causes the irregular wear? This is more difficult to determine, but we can give some tips.

When tyres are diagonal (not radial), it is normal for them to be rounded when inflated and for the tread to rest more in the centre than on the sides. In these cases the cue will be worn more through the center of the wheel, but in short it will be a homogeneous wear, but more pronounced in the central part.

When tyres are radial, if all is well, they should support evenly with a flatter footprint. If there is irregular wear in this case, first check whether the inflation pressures are correct for each use, in general they must be high for transportation and low for traction work in the field. Secondly, it is necessary to check the alignment of the front axle as it is possible that with time, the spherical plain bearings take some play and the parallel of the front tires are deformed, causing the wheels do not support properly and there is irregular wear of the blocks.

To measure the alignment there are more or less rudimentary methods that go well to correct an excessive deviation, but that nevertheless can't refine with an accuracy of millimeter. For this there are precision instruments that allow us to correct to the last millimeter and set the correct parallel, as you can see in our pictures.

Other causes that also influence irregular wear are derived from the different uses of the tractor. Water ballasts, the use of front loaders, the number and arrangement of tyre blocks, excessive use on the road, among other reasons can have a very negative influence on the regular wear of the tyre.

We would like to wish you a happy new year 2019. See you soon!!!

Versión en español.