Here are some frequently asked general questions. Click on the question to see the answer. There are more detailed questions and answers on the support pages for individual products. Please see links below.


Will a TyrePal work with my car?

Almost certainly! Systems can be configured for practically any vehicle with pneumatic tyres.

There must be room for the sensors to be screwed on to the tyre valves. Sensors are approximately 20mm diameter and 20mm long and ideally, should not protrude much beyond the tyre profile when fitted. In some cases, it may be desirable to fit shorter valve stems.

Please also check the maximum tyre pressure. Most cars and motorhomes can use the standard version, TB99 or TC215B, which cater for pressures up to 99psi. For higher pressures, typically on heavier vehicles use the TC215 truck and bus system (188psi)

Can I install it myself, and is it really quick to install?

Yes TyrePal systems really are very quick to install. There’s no wiring and no need to remove the tyres. The procedure is different for each model, so please refer to the instructions for detail.

For TB99, just screw the sensors onto the appropriate tyre valves and the monitor immediately displays the tyre pressures. You can then set alert levels as required.

TC215 systems can have sensors registered to any of 22 wheel positions, so you need to register the sensors prior to use.  Once sensors are registered, the display only shows data from the registered positions.

Are all the tools provided?

The only tool needed for the system is the locking key for the security system. That is included in the set.

How long is the warranty?

Warranty is one year from date of purchase. You can read our warranty terms or register your warranty on this web site.

Aren’t the sensors easily stolen?

Not really.  Sensors can be locked in position so that they require a tool to remove them. This prevents casual theft.

How are the valve-cap pressure sensors locked?


The sensors for the TC215B and TB99 have an integral locking screw which should be tightened once the sensor has been fitted on the wheel. If it is difficult to reach, take the sensor off and insert the locking screw into a different hole.

TC215E – heavy duty

The standard sensor, TCSE has an integral shroud that rotates freely over the sensor so it can only be fitted or removed with the supplied tool. The shroud can be removed if not required.


Flow-through sensors are secured by integral locking screws.

TA22X, TA400 and TD series

They are locked on by anti-theft rings which engage with the slots in the sensor.

What is included in the box?

Please see individual product specifications

How is temperature measured accurately?

Heat is transferred from the tyre through the metal of the wheel, and the system is sufficiently sensitive to measure the change as the tyres come up to normal operating temperatures, which is always several degrees above ambient.

As the seasons change, it is useful to know the tyre temperature. In cold weather, you need to have more air in the tyres the get them to the correct working pressure.

Temperature measurement is extremely useful for detecting problems with wheel bearings or with brakes binding. this can lead to tyre fires or to expensive bearing damage. Some HGV users have installed our systems primarily to give warning of overheating because they can’t afford the risk of a tyre fire.

What type of battery is used in the tyre valve sensors and how easy are these to replace?

Batteries for the sensors are flat lithium cells, CR1632, widely available, and you can order them here.

They should last at least a year in normal use (up to two years for TC215B/TB99 sensors). Replacing them only takes a few moments, just unscrew the outer cover from the sensor, slip the new battery into place and replace the cover. As you replace the cover, take care that the rubber o-ring is correctly seated and is in good condition.

What are the dimensions and weights of the sensors?


The sensors for the TC215B and TB99 are 20.5mm diameter x 20.5mm long. When fitted they extend 12.5mm beyond the length of the tyre valve.

They weigh 9g which is within the tolerance for most wheel balancing, so rebalancing after they are fitted is not usually necessary


These sensors are designed for large commercial vehicles and are 29.5mm diameter x 24.5mm long. Because of their dimensions and weight they are not suitable for cars or caravans, but can be used on larger motorhomes or commercial vehicles. They weigh 19g including the battery, which is within the tolerance for large wheels, so rebalancing after they are fitted is not usually necessary.

Can you supply a tyre pressure monitoring system for a car and caravan?

Yes we can.  Please click on this link. If you would like further details, please contact us

How does the TyrePal monitor fit in the car and can it be removed for security?


A re-usable sticky pad is provided for mounting the monitor. Just place the sticky pad on a clean flat surface and position the monitor on top. Choose a position where it can be seen by the driver without interrupting the view of the road. For security, it can be removed and hidden while the vehicle is unattended.


The TC215 is supplied with a robust windscreen mount with suction pad. Some models may also include a free-standing mount and a screw mount for permanent fixing.

Please see individual product specifications for detail.

Can I get extra sensors to use one monitor for two vehicles?

This is not really practical and the simplest way to use a single monitor on two vehicles is to switch the sensors from one vehicle to another.

The reason is because when you register additional sensors, the new sensor replaces any existing sensor in the same location. On systems designed to monitor more than four wheels, you can register additional sensors to new positions, but if you use this for two different vehicles, you will get ‘no-signal’ error messages from the vehicle that is not in use.

How do the external sensors on the TyrePal system compare with sensors fitted inside the tyres?

TyrePal can supply systems with either external or internal sensors.

External sensors

External sensors are generally better for DIY fitting to existing vehicles.

  • Much easier to install, as the tyres don’t need to be removed
  • Batteries are easily replaced and are readily available
  • Can be quickly switched between wheels. This is very useful for track use or for transferring between summer and winter tyres
  • Can be tested by the user very easily by switching them between tyres
  • Sensors can easily be replaced if necessary
  • TyrePal external sensors are designed to withstand all kinds of adverse conditions and have been rigorously tested, including extended life salt spray corrosion testing.

Internal sensors

Internal sensors are more appropriate for OEM applications.

  • Can be supplied pre-installed in wheel-tyre assemblies.
  • No exposed parts – completely protected against physical damage
  • Sensor battery is non-replaceble, but life can be matched to the service life of the tyres.
  • For retrofit, the tyre must be removed for installation


Don’t the external sensors corrode?

TyrePal TB99 and TC215 sensors have a brass thread which is very resistant to corrosion when used on normal tyre valves with a brass thread.

Corrosion occurs mostly where different metals are in contact in the presence of an electrolyte like salty water.  Some specialised tyre valve stems are made of aluminium. We do not recommend using the system with this type of valve as corrosion will occur where the different metals are in contact.

How is the signal transmitted from the sensor to the monitor?

TyrePal systems communicate at 433.92 MHz, and comply with strict international requirements about causing and accepting radio interference. All devices using radio frequency signals are subject to loss of signal from time to time and this may be more marked in certain areas, especially around military or communications installations. TyrePal systems are optimised to overcome interference as far as possible or to minimise its impact, while providing acceptable battery life. A TyrePal sensor measures the pressure and temperature of the tyre every few seconds, while it is in motion, but unless the pressure is actually falling, a signal is transmitted to the monitor very briefly only every five or six minutes. (The exact timing varies from model to model). This is done to reduce power consumption. In the event of falling pressure, the signal is transmitted immediately and is repeated every few seconds.

The monitor displays the latest reading it has received, so if a number of signals are not received due to interference, it merely means that the pressure displayed is not updated for a few cycles. In the event of falling pressure, repeated transmission means that a warning will still be given within half a minute or so.

If the monitor does not receive signals from a sensor for an extended period, it displays an alert for that tyre position. The exact period before this alert is given depends on the model.

For large vehicles or trailers where the transmission distance is greater than about 7m from the furthest sensor to the monitor, we recommend the use of a signal booster or repeater. This is typically positioned at the front of a trailer, where it can retransmit the signal from the tyre sensors, or in the case of a motorhome towing a car, at the rear of the motorhome. No configuration is required – it simply picks up the signal and re-transmits it automatically.

Is TyrePal suitable for high speed applications?

Yes! Our sensors have been actively tested at speeds up to 300km/hr. TyrePal systems are frequently used for high performance cars such as Ferrari, Porsche and Aston Martin for track and race applications where high speeds are the norm.

I want a system for racing. Can you help?

Please contact us through our enquiry form:

I’ve lost one of the sensors, can I get a replacement ?

Yes, for most systems, just go to the product page and you will see additional sensors listed. These can be registered for any tyre position.

Can you supply in my country?

We can currently supply systems to all EU countries.  When you order on line you will be asked for the country where the goods are to be sent. The appropriate shipping and VAT (tax) options are then presented to you.

Unfortunately we cannot supply outside of the EU at this time.

If your question is not answered here, please see the individual product pages:

TB99: Four or five wheel TPMS
TC215B: Caravan or motorhome TPMS
TC215OEK: TyrePal TPMS ready system
TC215: Heavy duty, truck and bus system
TC38: Heavy haulage system
or use the contact form to get in touch. Enquiries through the contact form will be treated as private communications.

Please also feel free to add comments in the section below. Any comment or question you post on the site may be published and may not receive an immediate reply.


FAQs — 13 Comments

  1. Hello, thank you for commenting on the TyrePal website, I am sorry to hear you are having issues with your tyres leaking. However I highly doubt it is the sensors causing the leak, i depends what has changed – if you have had new tyres it is possible that you have leaky valves / beads / tyres, or it could be the valve seals in the sensors are leaking – we have spares of these on our website to purchase. I hope this helps.

  2. I have had tyre pal fitted for two weeks and not being a gadget type person was sceptical. However what a brilliant system. I supply lots of vehicles and am considering offering them to clients. Would this be possible? I also sell tippers and concrete mixers, can I buy the truck ones too?

    I do however have a problem this morning in that one sensor isn’t working, no alarm or battery warning, just a blank space where the pressure should be displayed. I’ve changed the battery even though it’s inly two weeks old but no change. I’ve reset the system but again no change. Any clues? Can’t believe a sensor would have failed already?

  3. How necessary is it to have a full view of the monitor at all times. Is it is possible to rely just on the audible alarms.

    • Thank you for your comment, This is down to personal preference – being able to see the monitor easily gives you an easy view of the state of your tyres at any time, but should there be a significant issue then the audible alarm will certainly alert you to this. We recommend being able to see the monitor, but if this is not possible then the system will still operate and alert of any major issue.

  4. In view of the fact that garage tyre pressure gauges are notoriously inaccurate, how accurate is Tyrepal please.

  5. I am very pleased with the Tyre Pal monitor. I had to obtain and get shorter snap in tyre valves fitted to my car tyres at a total cost of £16 for 5 tyres including VAT. More of a nuisance than a problem! The monitor cold tyre pressures exactly matched my Newbow Certified Accurate Tyre Pressure Gauge readings which is re-assuring.

  6. I have used Tyre pal this summer with great satisfaction of being safer on the roads I just want to ask do I need to remove my sensors off for winter storage then refit next season?.

    • There’s no real need to remove sensors while a vehicle is in storage, but if you are preparing a trailer or caravan for winter, it is a good time to top up the air in the tyres and make sure there is no corrosion between the valves and the sensors.

  7. One of the sensors on my Tyrepal alerted me to high pressure,80 psi when the display usually shows 78.What may have caused this please?Is there anything I need to check before going out again?

    • Yes this is normal, the system is just telling you that the pressure is above the alert level you have set.
      As the spring and summer approaches and (we hope) ambient temperature rises, you will need to let some air out of the tyres to keep them at the correct operating pressues. The system is reminding you to do this.
      If your normal pressure is 78psi, it would be better to set the high alert level nearer to 85psi to allow for the normal increases while you are driving and to avoid unncessary alerts.

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