Best RV Tire Pressure Monitoring System

Part of our towing and security guide. This is the least exciting purchase in the hub and the one most likely to prevent an expensive day.

Our picks at a glance

Tap any row to jump to the full write-up.

#	Product	Best for	Beginner fit	Price
1	TST 507 Tire Pressure Monitoring SystemThe only warning you get before a trailer tire fails, because a trailer gives you no feedback through the steering wheel.	Knowing before the blowout	Good	Check price on Amazon
2	EEZTire Tire Pressure Monitoring SystemThe lower-cost way into tire monitoring: the same fundamental warning, a plainer monitor, and replaceable sensor batteries.	A cheaper way in	Good	Check price on Amazon
3	Master Lock Receiver Hitch Pin LockReplaces the clip pin anyone can pull out in a parking lot. It protects the ball mount, not the trailer.	Keeping the ball mount	Strong	Check price on Amazon

Prices are not published here. They change constantly and a stale number is worse than no number, so every button goes straight to the current Amazon listing. #ad — these are affiliate links and photographs are stock images of the category, not of the individual product.

Why a trailer needs this more than a car does

In a car, a tire losing pressure changes how the steering feels. You notice a pull, or a vagueness, and you stop.

A trailer gives you none of that. It is behind you, its tires are not connected to anything you hold, and a tow vehicle heavy enough to pull a trailer is not going to be unsettled by one of its tires going soft. The first indication is usually a noise, and by then the tire has come apart.

That is what makes this category different. It is not a convenience that saves you checking pressures; it is the only warning channel that exists.

What a failure actually costs

A trailer tire that disintegrates at highway speed throws tread. Tread hitting the underside of a trailer tears out wiring, damages the wheel well and skirt, and sometimes punctures the plumbing. The tire is the cheap part of the repair.

The NHTSA publishes general guidance on tire safety and maintenance that is worth reading, and the practical summary for a trailer is that under-inflation and heat are what kill tires.

The picks

1. Best for Knowing before the blowout

TST 507 Tire Pressure Monitoring System

The only warning you get before a trailer tire fails, because a trailer gives you no feedback through the steering wheel.

Specification

◆Monitor plus per-wheel sensors

Specification

◆Flow-through sensor option lets you inflate without removing them

Specification

◆Signal repeater available for long rigs

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What it does well

• +A trailer tire losing pressure gives you no steering feedback at all. The monitor is the only warning you get
• +Flow-through sensors mean topping up pressure does not require unscrewing anything
• +Watches temperature as well as pressure, and heat is how a failing tire announces itself

The real tradeoff

• –Costs more than most first-season purchases
• –Sensors need batteries and occasional attention
• –Long rigs may need the repeater, which is an extra

How it measures up

These are judgments from published specifications and what we see at the lodge, not laboratory results. How we choose.

Beginner fit

Good — Setup is a one-evening job, then it is automatic.

Install effort

Good — Screw sensors on, pair them, done.

Warning quality

Strong — Pressure and temperature, per wheel.

Value

Good — Expensive against a tire, cheap against the damage one does.

Specifications from TST.

2. Best for A cheaper way in

EEZTire Tire Pressure Monitoring System

The lower-cost way into tire monitoring: the same fundamental warning, a plainer monitor, and replaceable sensor batteries.

Specification

◆Monitor plus sensors

Specification

◆Sensor kits sold in several counts

Specification

◆User-replaceable sensor batteries

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What it does well

• +Usually costs less than the category leader for the same fundamental job
• +Sensor batteries are user-replaceable, which keeps the running cost sane

The real tradeoff

• –A more basic monitor interface
• –Long rigs will want the repeater here too

How it measures up

These are judgments from published specifications and what we see at the lodge, not laboratory results. How we choose.

Beginner fit

Good — Comparable setup.

Install effort

Good — Screw-on sensors.

Warning quality

Good — Pressure and temperature alerts.

Value

Strong — The reason to choose it.

3. Best for Keeping the ball mount

Master Lock Receiver Hitch Pin Lock

Replaces the clip pin anyone can pull out in a parking lot. It protects the ball mount, not the trailer.

Specification

◆Locking receiver pin

Specification

◆Common 5/8 in diameter for 2 in receivers

Specification

◆Weather-resistant

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What it does well

• +Replaces the clip pin anyone can pull out in a parking lot in two seconds
• +Stops the ball mount walking off, which is the cheap theft that happens constantly

The real tradeoff

• –Protects the ball mount, not the trailer. A coupler lock is a different product
• –The lock cylinder wants a squirt of lubricant once a season

How it measures up

These are judgments from published specifications and what we see at the lodge, not laboratory results. How we choose.

Beginner fit

Strong — Swap it for the clip pin.

Install effort

Strong — None.

Deterrence

Good — Stops opportunists, not a determined thief.

Value

Strong — Cheap relative to a ball mount.

Specifications from Master Lock.

What to look for

Flow-through sensors

Standard sensors screw onto the valve stem and seal it, so topping up pressure means removing the sensor, inflating, and refitting. Flow-through sensors let air through, so you inflate with the sensor in place.

This sounds minor. In practice it is the difference between checking pressures being a two-minute job and a fifteen-minute one, and the version that takes fifteen minutes is the version you skip.

Temperature as well as pressure

Heat is the mechanism of most tire failures. An under-inflated tire flexes more, flexing generates heat, and heat destroys the rubber and the belts. A system that reports temperature often warns you before pressure has changed enough to trip an alarm.

It also catches a dragging brake, which shows up as one wheel running hotter than its neighbors and which you would otherwise discover by smell.

Sensor count and the spare

Monitoring the spare is worth it. A spare that has quietly gone flat in its carrier is a spare you find out about at the worst possible moment.

A repeater for long rigs

The sensors have to reach the monitor in the cab. On a long fifth wheel the rear sensors are a long way back, and a repeater is the supported solution. Check availability before buying if your rig is long.

Battery life and replaceability

Sensors run on small batteries. Systems where those are user-replaceable keep the running cost sensible. Systems where they are not mean replacing sensors, which is a much worse proposition over several seasons.

What it does not replace

A monitor tells you what pressure a tire is at. It does not tell you the tire is six years old, which is the other common cause of trailer tire failure. Check the date code on the sidewall, and treat age as a reason to replace regardless of tread depth.

It also does not set your pressures. Use the figure on your trailer's placard, not the number on the tire sidewall, which is a maximum rather than a recommendation. That check belongs in the towing safety checklist.

Mistakes first-timers make

Buying too few sensors. Count the wheels, then add the spare.

Setting alarm thresholds and then ignoring them. The alarm exists so you stop. Stopping to look at a warm tire is twenty minutes; not stopping is a repair.

Using the sidewall maximum as the target pressure. Use the trailer placard.

Assuming a new trailer's tires are good. Trailer tires are frequently the cheapest component on a new trailer, and they age whether you use them or not.