By Jon Crowley
The Polaris XPEDITION has always been one of the most capable all-weather adventure UTVs on the market, but it has also had one characteristic that is difficult to ignore once you spend time inside its enclosed cab: noise.
For 2027, Polaris attacked that problem in a completely different way.
2027 Polaris XPEDITION with NUMATIX
Rather than simply adding more insulation or softening the clutch calibration, Polaris developed NUMATIX Controlled CVT, a pneumatically controlled system that can actively influence the CVT ratio and reduce engine RPM when full power isn’t needed.
After spending a full day driving a 2027 Polaris XPEDITION ADV 5 with NUMATIX in the Black Hills of South Dakota, I came away impressed. The difference isn’t subtle.
NUMATIX makes the XPEDITION considerably quieter and more comfortable without taking away the performance that makes the machine fun to drive. In fact, the 2027 is actually quicker than the previous model.
And as someone who owns an earlier XPEDITION, if I were buying one today, I would definitely choose a 2027 over a 2026.
Testing the 2027 Polaris XPEDITION in the Black Hills
My ride for the day was a 2027 Polaris XPEDITION ADV 5, the five-passenger version with the enclosed rear cargo area. The XP models use an open cargo bed, while the ADV configuration creates a fully enclosed rear storage area.
We started near Hill City, South Dakota, with a large group of more than 20 vehicles heading into the Black Hills.
As it turned out, we couldn’t have asked for much better conditions to test what an XPEDITION is supposed to do.
The morning started reasonably cool, but temperatures quickly climbed into the 80- to 85-degree range. It was also extremely dusty.
That’s where an enclosed NorthStar cab with HVAC immediately proves its worth. Instead of spending hours eating dust, we could keep the cab closed and let the air conditioning handle the heat.
Then the weather completely changed.
After lunch, thunderstorms moved through the area. We went from heavy dust to pouring rain and even hail. Temperatures eventually dropped to around 61 degrees, trails became muddy and sloppy, and then we’d travel only a few miles and find ourselves back in completely dry, dusty conditions before getting hit by another downpour.
Anyone riding an open UTV would have been miserable during portions of the ride.
Inside the XPEDITION, it really wasn’t a big deal.
The day reinforced something I’ve thought about the XPEDITION for a while: this is an exceptionally good all-weather UTV. Heat, heavy dust, rain, hail and mud all showed up during the same ride, and the enclosed HVAC cab made all of it much easier to deal with.
For some background on the platform and our earlier impressions, see our 2024 Polaris XPEDITION XP 5 NorthStar first-ride review.
How Polaris NUMATIX Works: Inside the Pneumatically Controlled CVT
What Is Polaris NUMATIX?
The biggest mechanical story for the 2027 Polaris XPEDITION is NUMATIX Controlled CVT.
The important thing to understand is that the XPEDITION still has a conventional mechanical belt-driven CVT underneath it. NUMATIX doesn’t replace the traditional clutch system. Instead, it adds the ability to actively influence CVT operation using compressed air.
According to Polaris, a Transmission Control Module monitors vehicle inputs 200 times per second to determine whether the engine needs to provide significant power.
The controller communicates with an Air Supply Unit, or ASU, that includes an onboard compressor. When the vehicle reaches a condition where full engine output isn’t necessary, the system can send compressed air to an actuator in the drive clutch.
That pneumatic force influences the continuously variable transmission ratio, allowing the engine to operate at a lower RPM without reducing vehicle speed.
The basic idea is easy to understand.
The engine may have needed a high RPM to accelerate the XPEDITION to 30, 35 or 40 mph. Once you’re cruising at that speed, however, it may not need to continue spinning that fast.
NUMATIX gives Polaris a way to intervene and lower engine RPM while retaining the aggressive mechanical clutch calibration needed when the driver asks for acceleration.
For a much deeper look at the hardware and operation, read our How Polaris NUMATIX Works technical guide.
Testing the 2027 Polaris XPEDITION ADV with NUMATIX Controlled CVT system in the Black Hills, SD
The Difference Is Immediately Noticeable
Numbers from a technical presentation are useful, but what I really wanted to know was whether NUMATIX would make a meaningful difference on the trail.
It does.
The easiest way to demonstrate it is to switch between Comfort and Sport modes. Sport turns the pneumatic intervention off, making it a useful real-world comparison between NUMATIX operation and the underlying mechanical clutch calibration.
During one test in High range, I was traveling approximately 26 mph.
In Comfort mode, the engine was turning about 3,700 RPM.
I switched to Sport, momentarily released and blipped the throttle so the new mode would engage, and returned to approximately the same speed.
Engine speed increased to approximately 5,600 to 5,700 RPM.
That’s roughly a 1,900- to 2,000-RPM difference at essentially the same vehicle speed.
More importantly, you don’t need to stare at the tachometer to notice it. The noise level in Sport was considerably higher.
I did another comparison in Low range at approximately 15 mph. Switching from Sport into Comfort dropped engine speed to roughly 3,300 to 3,400 RPM, and again the reduction in noise was immediately apparent.
Testing the 2027 Polaris XPEDITION ADV with NUMATIX Controlled CVT system – I experienced dramatic sound drop with NUMATIX
You Can Actually Have a Conversation
During the pre-ride technical presentation, Polaris explained that one of its development targets was straightforward: the driver and passenger should be able to have a conversation at 35 mph.
There’s a reason Polaris focused on that speed.
According to Polaris, data gathered from XPEDITIONs in the field shows that 93% of logged vehicle hours occur below 40 mph, with a significant usage spike around 35 mph.
Polaris says that at 35 mph in Comfort mode, NUMATIX can reduce engine speed by approximately 2,700 RPM, or 45%, when the system engages.
The company also claims a 40% reduction in noise measured at the driver’s ear under those conditions.
My experience supports the basic premise.
At roughly 30 to 40 mph in Comfort mode, carrying on a conversation inside the XPEDITION was pretty easy.
Switch to Sport and it becomes much more difficult.
That’s significant because Sport mode removes the NUMATIX intervention and gives you a pretty good idea of what the same vehicle is like with conventional mechanical CVT behavior.
For an enclosed adventure UTV designed around spending long days on the trail, reducing that constant engine and CVT noise makes a meaningful difference.
Testing the 2027 Polaris XPEDITION ADV with NUMATIX Controlled CVT system
NUMATIX Could Also Improve Fuel Economy and Range
One of the biggest secondary benefits of NUMATIX may be improved fuel economy.
Polaris says its testing showed a 26% improvement in fuel mileage in Comfort mode.
That’s a significant claim, particularly for an adventure-focused machine like the XPEDITION.
The reason is pretty straightforward. If the vehicle can maintain the same trail speed while turning substantially fewer engine RPM, the engine doesn’t need to work as hard simply to maintain that speed.
My 26-mph comparison illustrates just how large the difference can be. I saw approximately 3,700 RPM in Comfort versus 5,600 to 5,700 RPM in Sport while traveling at essentially the same speed.
Lower RPM can also mean reduced heat, vibration and wear in addition to lower noise.
But for XPEDITION owners, improved fuel economy has another important benefit: increased range.
This is a machine designed for long-distance adventure rides, remote trails and extended days away from a fuel pump. If NUMATIX can produce anything close to Polaris’s claimed fuel-economy improvement under real-world cruising conditions, that could provide noticeably more range between fuel stops.
I did not conduct a controlled fuel-economy test during this ride, so I can’t independently verify the 26% figure. That’s something we’d like to test over a longer period.
Even so, after seeing how dramatically NUMATIX can reduce cruising RPM, improved fuel economy makes sense as one of the technology’s most useful secondary benefits.
Comfort Mode Does Not Mean Less Power
One of my initial questions was whether making the XPEDITION quieter meant sacrificing performance.
It doesn’t.
Comfort, Standard and Sport aren’t simply progressively reduced-power modes.
Polaris says the full engine torque curve remains available in all three. The throttle mapping changes how quickly the driver accesses that performance, while NUMATIX determines when it can intervene without compromising the acceleration being requested.
Comfort gives NUMATIX the most opportunities to pull RPM down.
Standard keeps the pneumatic system active but gives the vehicle a slightly sportier throttle response.
Sport disables pneumatic CVT intervention and lets the revised mechanical clutch calibration do the work.
If you’re cruising in Comfort and suddenly demand full acceleration, the system doesn’t keep the engine at a low RPM and prevent it from making power.
That distinction is important.
NUMATIX isn’t making the XPEDITION quieter by making it slower.
The 2027 XPEDITION Is Actually Quicker
Polaris actually went in the opposite direction for 2027.
The XPEDITION receives a more aggressive mechanical clutch calibration with changes to the clutch spring, weights and clutch profile.
Polaris says the result is approximately a one-second improvement in 0-50 mph acceleration compared with previous XPEDITIONs.
And that improvement isn’t exclusive to Sport.
Because the changes are part of the underlying mechanical clutch calibration, that stronger acceleration is available across the drive modes.
In previous model years, Polaris had to balance an aggressive performance-oriented clutch tune against the additional RPM and noise it created during normal driving.
NUMATIX changes that compromise.
Polaris can give the XPEDITION more aggressive clutching when you’re asking for performance, then use pneumatic CVT control to bring RPM back down once the vehicle settles into a cruise.
It’s one of the things I find most interesting about the system. Polaris didn’t just reduce noise. The company found a way to reduce noise while simultaneously making the vehicle quicker.
Testing the 2027 Polaris XPEDITION ADV with NUMATIX Controlled CVT system after a hail storm
NUMATIX Helps at Low Speeds Too
Noise reduction gets most of the attention, but pneumatic clutch control provides another potentially important benefit during slow-speed operation.
When the system applies pneumatic pressure to the drive clutch, it can also increase belt-clamping force.
Polaris says this helps reduce belt slip and improves low-speed drivability.
Consider a situation where you’re traveling around 10 to 15 mph in High range as the trail gradually becomes more technical. Ideally you may already have shifted into Low, but that doesn’t always happen in the real world.
NUMATIX can provide additional belt pressure in those situations.
It can also make Low range more useful for longer periods.
When rock crawling, you might negotiate a difficult obstacle, drive an easier section of trail and then reach another rock section. Drivers will often shift back into High between obstacles because they don’t want to run the engine at unnecessarily high RPM for an extended period.
With NUMATIX lowering RPM when the load drops, you can potentially remain in Low more comfortably between obstacles.
The Low-range speed limiter doesn’t change, but the reduced cruising RPM can eliminate some unnecessary High-to-Low and Low-to-High shifting during technical rides.
2027 Polaris XPEDITION ADV with NUMATIX Controlled CVT system – Dusty conditions make the enclosed cab with HVAC much more comfortable
What Happens If NUMATIX Fails?
Adding electronics, air lines, valves and a compressor to a mechanical CVT naturally raises another question: what happens when something fails?
The answer is one of the things I like about the design.
NUMATIX acts on an otherwise functional mechanical CVT.
If pneumatic pressure disappears because of an air leak or system failure, the pneumatic intervention goes away and the clutch returns to conventional mechanical operation.
In other words, losing NUMATIX doesn’t mean losing the transmission.
During the presentation, Polaris explained that you could theoretically cut the pneumatic air line and the XPEDITION would simply revert to normal mechanical CVT operation, essentially similar to how the vehicle behaves in Sport mode.
The system also has onboard diagnostics, and Polaris says NUMATIX doesn’t require additional scheduled maintenance.
That’s a smart fail-safe strategy and one that should make owners more comfortable with the additional technology.
Onboard Air Is a Useful Bonus
If you’re already installing an air compressor on the XPEDITION to operate NUMATIX, you might as well let the owner use it too.
Polaris did.
There’s an onboard-air connection behind a removable exterior panel.
To use the auxiliary air system, the XPEDITION must be stationary and in Park. Pressing the onboard-air button switches the compressor from NUMATIX operation to auxiliary-air mode.
Polaris offers a 25-foot accessory air hose that is long enough to reach all four tires, making the system useful for airing tires back up after running reduced trail pressures.
There’s also a four-gallon portable water tank that can be pressurized by the XPEDITION’s onboard compressor.
At camp, that could be used for washing dishes, rinsing hands, cleaning muddy parts, washing off gear or even taking a quick trailside shower.
It’s a clever secondary benefit from hardware that’s already onboard to operate the CVT.
Is NUMATIX Worth the Extra $1,000?
After several hours behind the wheel, I couldn’t find a meaningful downside to the system itself.
Noise is reduced.
Cruising comfort is improved.
Performance hasn’t been sacrificed.
The more aggressive mechanical clutch calibration actually improves acceleration.
Pneumatic clutch control can provide additional belt grip at low speeds.
Lower cruising RPM may improve fuel economy and extend range.
And the compressor gives the XPEDITION a useful onboard-air system.
The downside is price.
The comparable 2027 XPEDITION is approximately $1,000 more than the 2026 model.
After driving it, I think NUMATIX is worth that extra money.
There is another catch for current XPEDITION owners: NUMATIX isn’t backward-compatible.
There are simply too many integrated components involved to make it a practical retrofit for earlier machines. If you want NUMATIX, you’re going to need a 2027 or newer XPEDITION equipped with it from the factory.
As the owner of an earlier XPEDITION myself, that’s unfortunate.
But if I were standing at a dealership choosing between a leftover 2026 and a comparable 2027, I’d 100% spend the extra money and buy the 2027.
A Few Things I’d Still Like Polaris to Improve
The 2027 improvements don’t mean the XPEDITION is perfect.
Intermittent Windshield Wipers
After spending part of the day driving through heavy rain and intermittent showers, one feature moved quickly up my wish list: an intermittent windshield-wiper setting.
The current windshield wiper operates at one speed. During light rain, I’d like to be able to select a delay rather than having the wiper run continuously.
The high mounting position also creates another minor annoyance. Because the windshield opens, the wiper can’t simply be mounted conventionally at the bottom. Instead, it sweeps water upward and some of that water/mud can then fall back down across the glass.
It’s not a deal breaker, but after a day of changing weather it was noticeable.
USB-C Instead of USB-A
I’d also like to see Polaris replace the XPEDITION’s USB-A connections with modern USB-C ports or at least offer one of each.
For a premium adventure vehicle in 2027, USB-C would be a more useful choice for current phones, tablets, cameras and other electronics people are likely to carry on long trips.
Apple CarPlay
Finally, I want Apple CarPlay.
Polaris has already announced future Apple CarPlay compatibility for certain 2027 RZR models using its newer portrait-oriented RIDE COMMAND display, including the 2027 RZR Pro R Boost.
I’d argue that the XPEDITION is an even more natural application.
This is a machine specifically designed for long days and long-distance adventure travel, where navigation, music and communication become more important. Apple CarPlay would fit the mission of the vehicle extremely well.
Where Should Polaris Use NUMATIX Next?
NUMATIX may have debuted on the XPEDITION, but I don’t think its potential should end there.
I don’t necessarily expect Polaris to immediately put it on the company’s highest-horsepower sport RZRs such as the Pro R, Pro S or Pro XP.
Those vehicles have a different mission, and outright performance takes priority over reducing cruising RPM and cabin noise.
But there is another Polaris RZR where I think NUMATIX could be a particularly good fit: the RZR XPS.
One of my criticisms of the XPS is its noise level.
That’s exactly the type of problem NUMATIX is designed to address.
An XPS could retain aggressive mechanical clutching and full performance when you’re on the throttle, then use pneumatic control to dramatically reduce RPM when cruising between faster sections of trail.
I’d like to see Polaris try it, even if NUMATIX initially appeared on something like a limited-edition RZR XPS.
The bigger story may ultimately be that NUMATIX isn’t just XPEDITION technology. If Polaris can adapt it to additional CVT-equipped platforms where noise and cruising RPM are concerns, it could become an important technology across a much larger portion of the lineup.
Having lunch in the Black Hills of South Dakota right before the downpour
2027 Polaris XPEDITION NUMATIX Review: Final Thoughts
The best new technology isn’t always something that makes a machine faster or gives it a bigger number on a specification sheet.
Sometimes it simply makes the vehicle better to live with.
That’s what NUMATIX does for the 2027 Polaris XPEDITION.
Our Black Hills ride gave us almost every condition we could have asked for: warm temperatures, extremely heavy dust, rain, hail, mud and significant temperature changes.
Through all of it, the enclosed HVAC cab reinforced why the XPEDITION works so well as an all-weather adventure vehicle.
NUMATIX then addressed one of the major weaknesses of that enclosed experience: drivetrain noise.
The difference between Comfort and Sport was obvious both on the tachometer and to my ears. At approximately 26 mph, I saw roughly 3,700 RPM in Comfort versus 5,600 to 5,700 RPM in Sport.
At 30 to 40 mph, the ability to comfortably talk with a passenger in Comfort mode was one of the most meaningful improvements I experienced all day.
Polaris didn’t achieve that by taking performance away. The 2027 is actually quicker, and full engine performance remains available when you ask for it.
Then there are the secondary benefits: potentially better belt control, onboard air, less vibration and heat, and a Polaris-claimed 26% improvement in Comfort-mode fuel economy that could translate into meaningfully greater range on long adventure rides.
After a full day with the system, my takeaway is pretty simple:
NUMATIX makes the XPEDITION a better XPEDITION.
It costs about $1,000 more, but if I were choosing between a 2026 and a 2027, I’d spend the extra money and get the 2027.
For additional model information, technical articles and reviews, visit our Polaris XPEDITION guide, see what’s new across the 2027 Polaris UTV lineup, or browse all of our Polaris UTV news, reviews and guides.
