November 25, 2025
High reach telehandlers: Aiming high
REPORT: Telehandlers are growing in capacity and reach as businesses look to get more from these versatile machines.
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Tyres & tracks
Here you can find the archive of profi test reports on a wide range of tyres and tracks.
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October 1, 2025
Jaguar forager converted to tracks: Not making tracks…with tracks
REPORT: German contractors Logemann and Röbenjohanns not only kitted out a Claas Jaguar with tracks, but they also modified a pair of dumpers that can tip into hook-lift containers.
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August 3, 2025
Determining axle lead and selecting tyres: A simple calculation
TECHNICAL: Whether it's replacing worn-out tyres or you're wanting to fit a different size, there are several things to consider when booting up with different rubber.
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February 14, 2025
Ground pressure — measurements vs simulation: Close to reality
TECHNICAL: Last month, we presented the ground pressure simulation that was carried out by Dresden Technical University. Terranimo from Switzerland has also been working on this subject for a very long time. Here are a…
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February 1, 2024
Retrofitting ISOfill — a tyre pressure control system from HR Agrartechnik: Ever ISO simple
WORKSHOP: Yes, we've been here before ... looking at how to tackle the job of retrofitting a tyre pressure control system. Where ISOfill is slightly different is that it can be operated from an ISObus…
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August 5, 2023
Basics of soil compaction: Into the depths
TECHNICAL: Roger Stirnimann, from the University of Agricultural, Forest and Food Sciences (HAFL) in Switzerland, discusses the basics of tyres and ground pressure and how they can result in compaction.
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August 5, 2023
Fitting a PTG Airbooster kit: Faster air
WORKSHOP: Only have valves on the inside of your wheel rims? Then the task of changing tyre pressures can be more challenging. Yet it is possible to retrofit these on the outside without taking off…
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August 4, 2023
Retrofit tyre pressure system: No compromise on pressure
REPORT: Brothers Paul and PJ McGrath are aware of the benefits of lowering tyre pressures, but they concede that it hasn't been done religiously ... until now. To reduce the pressure-altering hassle, they retrofitted a…
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April 25, 2023
Larger tractor tyres: profi reports
New larger tractor tyres are expected to play an important role in Vredestein plans to double European turnover within the next five years.
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December 17, 2022
Workshop: Self-made tyre pressure control
I upgraded our CVX1135 with a tyre pressure control system I developed myself. The electronic control is looked after by two Arduino boards, one for the front and one for the rear axle. They are…
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July 21, 2022
Eight tyre pressure control systems: Easy pressure peasy
Tyre tech has come on a long way over the past 10 years, but, if you want to make the most of the promised potential, then you need to adjust the pressures up and down…
