Properly planning tire pressure monitoring in a self-converted campervan

You invest weeks in the perfect conversion of your campervan – but have you considered the safety of your tires? A shocking statistic: Up to 401,300 of all tire failures in motorhomes are caused by gradual pressure loss, which usually goes unnoticed without a tire pressure monitoring system. Especially with self-conversions, where weight distribution and payload differ significantly from the base vehicle, continuous tire pressure monitoring becomes a critical safety factor.

Why DIYers should plan for TPMS from the start

Converting a van into a campervan fundamentally changes the vehicle's handling characteristics. Wooden paneling, custom furniture, water tanks, solar panels, and battery systems quickly add several hundred kilograms to the base weight. This increase in weight directly affects the optimal tire pressure – and therefore your safety on every journey.

A professional tire pressure monitoring system (TPMS) warns you in real time of dangerous pressure drops or tire overheating. Especially on highways or when driving uphill, where the tires are under heavy load, this early warning can make all the difference. Unlike factory-built motorhomes, self-built ones often lack factory-integrated TPMS – retrofitting is therefore not only advisable, but essential.

The good news for DIY enthusiasts: Modern TPMS systems like TireMoni can be easily installed yourself. Installation takes less than 30 minutes and requires no special tools. This makes integration a perfect fit for your conversion plans – ideally before the interior trim is installed, to optimize cable routing and display positioning.

Choosing the right system for your expansion type

Not every TPMS (Tire Pressure Monitoring System) is suitable for every DIY campervan conversion project. The choice of system depends on several factors: the base vehicle, the planned payload, and your travel plans. For a compact, two-axle panel van, a basic system with four sensors is perfectly adequate. However, if you plan to convert a larger van or tow a trailer later, you should consider expandability.

External sensors offer crucial advantages for self-conversion: they can be installed without tools, are easily replaceable, and allow for visual inspections. A battery life of approximately two years or 50,000 kilometers easily covers several travel seasons.

An often overlooked aspect: display integration. During the conversion phase, you can determine the optimal position for the TPMS display – within your field of vision, but not obtrusive. Many DIYers integrate it into custom-built dashboard extensions or overhead consoles. The compact TireMoni displays blend seamlessly into any cockpit design and provide all relevant data at a glance.

Weight management and tire pressure: What you need to know

The biggest difference between your self-converted campervan and a standard production model lies in the individual weight distribution. While manufacturers design their vehicles for defined load scenarios, you tailor your conversion to your personal needs. A heavy water tank in the rear, a lithium battery under the bed, or a roof terrace – each element affects the axle load and therefore the required tire pressure.

This is where tire pressure monitoring comes into play when converting your campervan yourself: it shows you not only the current pressure but also the tire temperature. Overheated tires are often the first sign of overloading or insufficient pressure. With a TPMS, you can detect such problems before they become critical. This feedback is invaluable, especially on your first long trip after the conversion, when you're still getting used to the new driving characteristics.

Experts recommend having a professional axle load measurement performed after the conversion and adjusting the tire pressure accordingly. Most self-converted vehicles, with their finished configuration, weigh 300-600 kg more than the base vehicle's unladen weight. This additional load often necessitates increasing the tire pressure by 0.3 to 0.5 bar compared to the manufacturer's specifications for the base vehicle.

Practical integration: How to install TPMS correctly

Ideally, the installation of a tire pressure monitoring system (TPMS) should take place during the middle of the vehicle's conversion phase – when the electrical wiring is being installed, but before the final interior trim is fitted. Plan for powering the display via the cigarette lighter socket or a dedicated 12V connection. The latter is more elegant and saves a socket for other devices.

You have two options for sensor installation: either attach the sensors directly after changing your tires or take the opportunity before your first long trip. The sensors simply screw onto the valves – no tire change or balancing required. Make sure to securely close the valve caps to protect the sensors from dirt and moisture.

For DIY campervan builders with trailer ambitions, an expandable system is recommended. TireMoni systems can be upgraded with additional sensors, allowing you to monitor your caravan or motorcycle trailer as well. This flexibility saves on future purchases, and your system grows with your travel plans.

Investing in security: Costs and benefits

A high-quality TPMS for self-installation costs between €150 and €350 – depending on the number of sensors and the range of functions. Compared to the total cost of a complete system installation (averaging €15,000–€30,000), this is a manageable expense. However, the benefits far outweigh the purchase price: studies show that correct tire pressure reduces fuel consumption by up to 81 TDP and extends tire life by up to 30 TDP.

For a typical self-converted campervan with 10,000 kilometers driven annually, this translates to savings of approximately 200-300 euros per year simply through optimized tire pressure. The system therefore pays for itself within the first year. Added to this is the invaluable safety benefit: knowing you'll be immediately warned of any pressure drop provides peace of mind on every journey.

For over 20 years, TireMoni has been developing tire pressure monitoring systems (TPMS) known for their reliability and ease of use. The systems are ADAC-recommended and meet all current ECE requirements – quality standards that are crucial, especially for safety-relevant equipment. Many DIY campervan builders report that the TPMS is among the most valuable investments of their entire project.

Conclusion: Safety begins with planning.

Anyone who converts their own campervan takes responsibility for every detail – including tire safety. A tire pressure monitoring system is essential equipment for any well-planned self-conversion. It protects not only your investment, but above all your safety and that of your fellow travelers. 

Visit us at the DIY campervan conversion trade fair in Stuttgart (January 22-25, 2025) and let our experts advise you on which TireMoni system is best suited to your project. Your tires will thank you – and you can concentrate on what you converted your campervan for: boundless freedom on four wheels.