Best Trailer Tire Pressure Monitoring Systems
Compare dedicated-screen and smartphone trailer TPMS kits by sensor style, wheel count, signal range and valve-stem compatibility.
Compare Current OptionsA trailer TPMS can alert you to pressure changes you cannot see from the driver’s seat. But a poor sensor-to-valve fit, missing repeater or incorrect alert threshold can undermine the system before you leave the driveway.
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01 Quick picks by monitoring setup
These are not interchangeable bundles: sensor quantity, display style and valve requirements can change the right answer.
Cap-style transmitters, color monitor and an included repeater in current kits.
Uses flow-through valve-mounted sensors so compatible tires can be inflated without removing the transmitter.
A color-monitor system with a towing/towed display arrangement and support for multiple stored vehicle configurations.
Routes tire monitoring to a phone rather than requiring a separate conventional dashboard monitor.
A standalone monitor family intended for multi-wheel RV and trailer monitoring, with owner documentation available.
02 Compare the actual buying differences
This comparison focuses on how you use the system, not a fabricated ranking score. Maximum sensor capacity is different from sensors supplied.
| System | Display | Fitment / specification gate | Best use |
|---|---|---|---|
| TST 507 Cap Sensor System | 3.5-inch color monitor | Cap sensors; 0–218 psi published system range | Best dedicated display for standard valves |
| TST 507 Flow-Through System | 3.5-inch color monitor | Flow-through sensors; verify valve-stem clearance | Best for frequent pressure top-offs |
| TireMinder i10 | 3.15-inch color display | Up to 20 simultaneously monitored tires | Best multi-vehicle display |
| TireMinder Smart TPMS | Smartphone-based display | App and phone compatibility are buying gates | Best smartphone-based option |
| EEZTire E518 | Dedicated monitor | Up to 26 tires per manufacturer documentation | Best alternative expandable RV monitor |
03 Five TPMS options explained
Select the kit version and sensor quantity for your actual trailer. Brand-level specifications are not a promise about what comes in a particular retail box.
TST 507 Cap Sensor System
Cap-style transmitters, color monitor and an included repeater in current kits.
Who it suits: A trailer owner wanting a dedicated dash screen without removing sensors to add air through them.
What matters: TST publishes a 110-sensor system limit and four trailer/tow profiles; those are system capabilities, not the number included in a kit.
Before ordering: Confirm included transmitter quantity, wheel/valve compatibility, signal booster arrangements and your trailer’s cold inflation pressure.
Check PriceTST 507 Flow-Through System
Uses flow-through valve-mounted sensors so compatible tires can be inflated without removing the transmitter.
Who it suits: Owners who regularly adjust inflation and have suitable metal valve stems and wheel clearance.
What matters: The manufacturer lists 0–218 psi measurement range and adjustable alerts; confirm the exact included sensor count and repeater before ordering.
Before ordering: Confirm included transmitter quantity, wheel/valve compatibility, signal booster arrangements and your trailer’s cold inflation pressure.
Check PriceTireMinder i10
A color-monitor system with a towing/towed display arrangement and support for multiple stored vehicle configurations.
Who it suits: RV owners who want to see tow-vehicle and trailer readings together and may switch rigs.
What matters: The manufacturer specifies 0–199 psi and approximately ±1 psi accuracy, with up to 20 actively monitored tires; verify sensor kit size.
Before ordering: Confirm included transmitter quantity, wheel/valve compatibility, signal booster arrangements and your trailer’s cold inflation pressure.
Check PriceTireMinder Smart TPMS
Routes tire monitoring to a phone rather than requiring a separate conventional dashboard monitor.
Who it suits: Drivers comfortable relying on a phone display and checking app/platform support before purchase.
What matters: TireMinder identifies this as its smartphone-based model; verify current CarPlay/Android Auto support for your exact phone and kit.
Before ordering: Confirm included transmitter quantity, wheel/valve compatibility, signal booster arrangements and your trailer’s cold inflation pressure.
Check PriceEEZTire E518
A standalone monitor family intended for multi-wheel RV and trailer monitoring, with owner documentation available.
Who it suits: Owners looking for an alternative to TST and TireMinder with documented multi-axle capacity.
What matters: The published E518 manual and manufacturer information describe support for up to 26 tires; check current model generation and accessory availability.
Before ordering: Confirm included transmitter quantity, wheel/valve compatibility, signal booster arrangements and your trailer’s cold inflation pressure.
Check Price04 Seven checks before ordering
These checks prevent most avoidable mismatches between an attractive TPMS kit and a real trailer.
- Count every wheel that needs monitoring, including dual rear wheels if relevant. A four-sensor kit cannot cover six tire positions without additional transmitters.
- Read the trailer tire placard and tire manufacturer guidance for the correct cold inflation pressure. A TPMS reports pressure; it does not determine the correct target.
- Check valve stem construction, stem angle, wheel recess and sensor weight. Ask the system maker or tire professional whether external sensors are appropriate for your stems.
- Decide whether cap or flow-through sensors make sense. Flow-through styles simplify adding air but require more clearance; confirm kit-specific valve compatibility.
- Check wireless range for the complete truck-and-trailer length and whether the kit includes or supports a repeater. Test reception before a long trip.
- Confirm pressure range, temperature warnings, user-set thresholds, replaceable batteries and sensor availability for the exact model—not just the product family.
- Test sensor placement and alerts before departure, and still use a quality gauge for routine cold-pressure checks.
05 Choose by your actual setup
Start with tire positions and valve access, not screen size. A two-axle travel trailer usually needs four transmitters, while a fifth-wheel with dual tires or an owner monitoring the tow vehicle may need more. Verify the exact kit count: “supports 20 tires” does not mean 20 sensors are included.
Why alert settings matter
A pressure reading is useful only when interpreted against the correct cold inflation target for the loaded trailer. Set low/high pressure and temperature alerts according to the system instructions, trailer placard and tire guidance. Pressure naturally changes as tires warm, so do not bleed hot tires merely to match a cold setting.
What TPMS cannot do
It cannot measure remaining tread life, detect every internal defect, compensate for overloaded axles, or guarantee a warning before a sudden failure. Continue checking tire age, condition, wheel torque, load and inflation with appropriate procedures.
06 Frequently asked questions
Does a trailer TPMS replace a tire pressure gauge?
No. It is an early-warning and monitoring aid. Set correct cold pressure using the trailer and tire guidance, then verify with an accurate gauge before travel.
Do I need metal valve stems for external TPMS sensors?
Some external transmitters place enough additional mass on the stem that the manufacturer recommends or requires metal stems. Check the exact sensor manual and ask a tire professional if uncertain.
How many sensors does a tandem-axle trailer need?
A typical tandem-axle trailer with single tires on each side has four road-tire positions. Dual-wheel setups need more; count the actual tires and consider how the spare will be handled.
Will a TPMS warn me before a blowout?
It can alert you to monitored pressure loss or temperature conditions, but not every failure develops slowly enough for a warning. It cannot prevent tire failures or substitute for proper loading and maintenance.
Should I choose cap or flow-through sensors?
Cap sensors are compact and generally removed for inflation. Flow-through sensors can allow inflation through the sensor, but are bulkier and may impose tighter stem-clearance requirements.
Can one display monitor both truck and trailer tires?
Some systems support combined vehicle monitoring, but capacity, display arrangement and sensor compatibility vary. Confirm your truck setup and the selected system’s active tire limit.
07 Buy the system that fits your wheels
A useful TPMS is one you can configure, receive reliably and maintain. Confirm sensor count, stem compatibility, pressure range and repeater requirements before comparing display extras. None replaces cold-pressure checks or safe trailer loading.