Flywheel training has gained popularity due to its unique ability to build strength, power, and resilience, unlike traditional weights. Two standout machines in this space are the Kratos Quest Station and the Exxentric kBox Pro. But which one is the right choice for you? Let’s break down the differences, performance, and overall value of each machine to help you decide.
1. Key Differences
Plane Capabilities
One of the biggest distinctions between these two machines is their movement versatility.
The Kratos Quest Station operates in both vertical and horizontal planes, making it more versatile for a variety of exercises, including rows, deadlifts, and squats. This is achieved through a remote anchor that easily attaches to either the platform or the vertical tube.
The Exxentric kBox Pro, on the other hand, is limited to vertical movements. While you can use the angle adjuster to slightly modify the feel of certain exercises, it doesn’t offer true horizontal plane training. If you want horizontal plane capability, you’d need to purchase the separate kPulley, which significantly increases cost.
Mounting Flexibility
The Quest Station can be used as a freestanding platform or paired with the Quest rack mount tube or wall-mounted tube for added versatility. It also has a “without platform” configuration, which saves $800 but requires permanent mounting to the floor. The biggest advantage of this setup is that it integrates seamlessly into the floor, keeping your training space clear.
The kBox Pro is a standalone unit that can be left mobile or semi-permanently attached to the floor using either four leg attachments for a fully fixed installation or a centered attachment kit for a less permanent option. The kBox is lightweight and easy to move, making it a solid option for those who need flexibility in gym layout.
Profile & Platform Size
The Quest Station has a lower side profile but features a larger platform, allowing for more foot placement options. However, despite a low profile 2” height, the platform does take up slightly more gym space compared to a flush-mounted option.
The kBox has a higher profile but a smaller platform, making it easier to move and store when not in use.
kBox with a taller platform compared to the Quest Station 
Quest Station with an overall larger platform compared to the kBox
2. Performance Mechanics
Anchor Point Mechanics
The Quest Station’s remote anchor maintains a consistent pull point, ensuring that the center of pull never shifts, regardless of exercise.
The kBox’s anchor point changes direction as the flywheel driveshaft reverses at the top of each rep. This results in a 5/8-inch deviation in the pull path at the bottom of the movement. While not a deal breaker, it’s something to note, especially for users focused on movement consistency.
Bottom of a movement 
Bottom of the next rep
Feel of the Pull
The Quest Station’s drive shaft operates smoothly with no significant resistance, providing a natural feel during flywheel movements.
The kBox has more resistance in the driveshaft, which is noticeable when using smaller flywheels. This can be a disadvantage for certain upper-body movements where inertia buildup is crucial. However, the added resistance makes stopping the flywheel at the end of a set easier.
3. Ease of Use
Setup & Adjustments
Both machines are straightforward to set up.
The Quest Station uses a remote anchor that can be quickly adjusted and is paired with a numbered strap to help setup movements consistently and uses a lift mechanism for smooth retraction.
The lever is easily lifted to adjust strap length on the Quest Station The kBox features an angle adjuster that is simple to install and has a foot button for strap retraction but does NOT use a numbered strap.
The red button is easily depressed with your foot to adjust the webbing length
Attachment Point
The Quest station utilizes a sailing type clasp which is very strong but for some, may be a slight learning curve to figure out. Once you have it, it is simple to operate. I have not found an attachment that doesn't work with this sleek and clever design
The Quest Station remote anchor installed in the platform with the sailing type clasp for attachments The kBox utilizes a quicker attachment point that consists of a spring loaded hook that automatically accepts an attachment and requires the spring tension to be taken off the hook to get the attachment back off. Unfortunately, this connection block is so thick that attachments such as MAG grips and the new Porter PhysEd Eclipse Grip will require a carabiner be used to make the attachment work with the kBox.
Flywheel Changes
The Quest Station has a pin-retained flywheel knob, making it easy to swap disks.
The kBox uses a flywheel retainer with no major issues in functionality.
4. Tech & Data Tracking
Kratos Quest Station
Can be paired with the RepOne sensor for tracking performance.
The RepOne sensor costs an additional $400, offering Bluetooth connectivity and customizable data columns.
The downside? The app requires users to manually enter exercise names and disk load for each set, which can be tedious.
Exxentric kBox Pro
Features a built-in kMeter app for tracking power output, eccentric overload, and velocity.
The app is plug-and-play but occasionally requires a reset due to a power-saving mode on the sensor.
5. Strength, Power & Athletic Performance
Both machines are exceptional for building eccentric strength, making them ideal for athletes and rehab settings.
The Quest Station’s horizontal plane capability makes it the superior choice for athletic training, especially for rows, pulls, and rotational movements.
The kBox Pro is still effective for these movements but is limited by its vertical-only orientation. While the kPulley can be purchased separately to add horizontal training, it significantly increases the overall investment.
6. Pros & Cons
Feature | Kratos Quest Station | Exxentric kBox Pro |
Planes of Motion | Vertical & Horizontal | Vertical Only |
Mounting Options | Freestanding or floor-mounted | Freestanding, floor-attached |
Anchor Mechanics | No shift (consistent pull) | ~5/8" shift each rep |
Platform Profile | Low profile, larger platform | Higher profile, smaller platform |
Tech Integration | RepOne sensor option | Built-in kMeter standard |
Performance Feel | Smooth & consistent | Slight resistance with smaller flywheel |
Price | $2799 no RepOne Sensor $3199 w/RepOne Sensor Includes XL/M Disk, 2 handles, & Shipping standard | $3359 includes kMeter, L Disk, Hip Belt, 2 Handles & Shipping $3639 includes kMeter, XS-S-M-L-XL, hip belt, 2handles & Shipping |
Country of Origin | Made in USA | Made in Sweden |
7. Conclusion – Which One Should You Choose?
If you prioritize versatility and want both vertical and horizontal movements, the Quest Station is the better choice.
If you prefer a simple, plug-and-play experience with built-in data tracking, the kBox Pro might be the way to go.
For those with permanent gym setups, the Quest Station’s flush-mounting capability is a major advantage.
Personal Verdict: I prefer the Quest Station in the without-platform configuration, built into my floor. When traveling or training elsewhere, the kBox is my go-to for when I require mobility and ease of setup.
DISCLOSURE: Both Exxentric and Kratos Fly Fitness provided these units free of charge in exchange for content. Neither company paid money and I am not doing affiliate marketing with either brand. There are no affiliate links or trackable links in this article.