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EAN: 4001397566144
MPN: 7691-400
8.1Expert Score
Kettler Skylon 4 Folding Elliptical Review

Finding a great elliptical is not easy. Kettler has made the world a better place, continuously delivering high quality fitness cross trainers. Check the Skylon 4, you won't regret it

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At a Glance: Kettler Skylon 4 Elliptical
Brand Kettler
Price Range $1000 to $1500
Max User Weight 330 lbs (150 Kg)
Flywheel Weight 44 pounds (20 kg)
Stride length 20 Inches (50 cm)
Resistance Levels 15
Dimensions 84 x 27 x 70 inches (214 cm x 68 cm x 170 cm)
Training Programs 10
Computer / Display Large LCD
Warranty 3 years parts and labor
Q-Factor 4 inches (10 cm)

Kettler Skylon 4 Elliptical Review: Few elliptical trainers allow users to perform such elliptical motion as the Skylon 4, because of its design, and you glide along as you move. Once you train with this device, you will probably never be interested in an alternative.

But not only the design, also the possibilities of functions, which this elliptical trainer offers, are not to be despised: 20 kg flywheel weight, 15 resistance levels, load capacity up to 150 kg and a well integrated training computer clearly upgrade the model. A folding function has been integrated as a further feature. Thus the Kettler Skylon 4 elliptical trainer can be easily folded and stored after the workout.

A good equipment, high-quality manufactured components and a folding function provide an obvious added value for the customer.

  • Compact and foldable
  • High Quality
  • With folding function
  • Can be loaded up to 330 lbs (150 kg)
  • 15 resistance levels
  • 10 training programs
  • 44 pounds (20 kg) flywheel

  • No connection of the console to a fitness app
  • No integrated bluetooth interface
  • The price could be a deal breaker for some buyers, looking for more affordable models
  • The products of the Skylon series are quite expensive in terms of purchase price

Kettler Skylon 4 Folding Elliptical Trainer

Kettler’s Skylon 4 elliptical trainer is part of a series produced by Kettler, which can be identified mainly by its high tech features. Kettler combines the proven quality with more and more innovations. Compared to the Skylon 3, the training computer has been upgraded. The display convinces by an easy handling and a compact and sporty design. Kettler also succeeded in integrating the quality and high-grade workmanship of its predecessor into the Skylon 4.

The motion execution remains identical throughout the entire Skylon series. The elliptical trainers were designed in such a way that users achieve a perfect ellipse during the workout. Currently, this perfectly developed design is unique on the elliptical trainer market. Additionally, the low pedal spacing prevents an X-adjustment. As a nice extra, the Kettler Skylon 4 elliptical trainer has a folding function including floor wheels.

Easy handling, 10 pre-installed training programs and the possibility to save several user profiles guarantee motivation

The Skylon 4 integrated multifunctional computer has an easy menu navigation. The most important values like time, distance, watt, speed, cadence, calories and pulse are displayed legibly.

Furthermore, users can train up to 10 training programs: 6 are pre-installed and 4 can be individually adjusted. It is also possible to start a heart rate oriented training. A total of 4 user profiles can be created and saved. Thus you can effectively plan your training over a longer period of time.

A lot of quality, a movement which is perfect in every detail and high-quality materials. This is the Kettler Skylon 4 elliptical trainer

Athletes looking for a machine of high quality construction, with a lot of quality and based on durability should take a look at the Skylon 4. This elliptical trainer combines attributes such as quality, value, endurance and combines all this with performance. No matter if 44 lbs (20 kg) flywheel weight, 15 resistance levels or a possible load capacity of up to 330 lbs (150 kg), the basis is right. The training computer has 10 pre-installed programs (9 regular and 1 dedicated to heart rate) or the option to save 4 (+guest) user profiles simultaneously. In addition, an integrated folding mechanism allows the Skylon 4 to be quickly stored away after the session if necessary. What is unfortunately negatively noticeable is the missing connection of the console to a fitness app. And the partly for some prospective customers quite high purchase price.

The high-quality training computer is easy to use and has a simple menu control. It offers storage space for four persons and one guest. With 10 training programs and a program editor, you can really work up a sweat.

During the workout, the currently exercised power is displayed and the motor-adjustable magnetic brake system allows you to set up to 15 load levels. The flywheel system provides an especially even rotation and together with the especially narrow treading surface distances, the Skylon 4 offers an effective workout.

Kettler Skylon 4 Price

The Kettler Skylon 4 is usually sold on a price ranging from $1000 to $1500.

Kettler Skylon 4 Warranty

The Kettler Skylon 4 Elliptical comes with a 3 year parts and labor warranty

Kettler Skylon 4 Stride Length

The Kettler Skylon 4 has a stride length of 20 inches (50 cm).

Kettler Skylon 4 Max user Weight

The Kettler Skylon 4 has a max user weight capacity of 330 pounds (150 kg)

Kettler Skylon 4 User Manual

Manual If want to learn more about this elliptical, please refer to the Official Kettler Skylon 4 User’s Manual

Kettler Skylon 4 Elliptical Console Display

The new Advanced Display

Adopted from the automobile industry, Kettler now relies on the simple menu control on the display. This way it was always a bit more extensive and complicated with older elliptical trainers until you could start exercising. With the new displays you only have 3 levels to adjust.

The start menu: Simply select the user
The user menu: Set the training program here
The training screen: Your training begins

The new Advanced Display is based on LCD technology and shows you the training parameters in large and clear graphics. By mounting the display on the bar, Kettler has created a reasonable holder for your tablet or smartphone.

The Kettler Sklyon 4 is a solid and high-quality elliptical trainer

The Skylon 4 elliptical trainer is manufactured in Kettler’s own factory in Germany. The sturdy frame construction can take loads of up to 150 kg or 330 pounds. Thus, even people with a heavy body weight can safely train on the Kettler elliptical trainer. The manual adjustable feet make it possible to compensate for uneven floors and give the Sklyon 4 elliptical trainer a non-tilting stand. All joints of the Kettler Skylon 4 have high-quality bearings. Self-aligning ball bearings in the push bars and double ball bearings in the movable joints ensure a long durability and contribute to the smooth motion of the Kettler Skylon 4. The front drive unit works optimally with the 22 kg or 44 pounds flywheel or . Together, they allow the Kettler elliptical trainer to run evenly. The motor-controlled magnetic brake allows the resistance to be adjusted in 15 difficulty levels. Thus, the workout can be adjusted to the individual fitness level.

The Kettler Skylon 4 offers an even and natural motion

The elliptical trainer Kettler Skylon 4 offers an even rotation free of dead centers due to its high-quality mechanism. The ergonomic arm bars in combination with the small distance between the pedals and the motion-dynamic pedals allow for a natural movement on the Skylon 4. The movement with a stride length of 50 cm (or 20 inches) can be compared to walking or jogging, depending on body size.

Which training goals can be reached with the Kettler Skylon 4 elliptical trainer?

The Kettler Skylon 4 is an endurance training device. Regular training promotes general performance. Helps to reduce body weight by lowering the body fat percentage. Training on the Kettler elliptical trainer demands many muscles at the same time. Legs and bottom set the footplates in motion. The lower back and abdominal muscles ensure an upright posture. Upper back, shoulders and arms set the arm bars in motion.

Kettler’s Skylon 4 elliptical trainer is foldable and rollable

Kettler Skylon 4 Folded
After training, the running rails of the Kettler Sklyon 4 can be folded up. This reduces the elliptical trainer’s space requirement considerably. The Kettler elliptical trainer can now be moved thanks to integrated rollers.

Training Computer with a multitude of functions

Initially, 4 user profiles can be created. In these profiles the settings and personal data are stored. This means that all entries do not have to be re-entered before each training session. The metrics saved are:

  • personal data
  • personal training scope
  • last training
  • an individual training profile

If no data is to be stored, you can train in guest mode. The Kettler Advanced training computer offers variety and motivation. Pre-defined training programs for different training goals help to achieve your own goals. The pulse-controlled training is especially efficient and prevents overexertion. The computer controls the training intensity according to the given pulse value. Pulse value and other relevant training data are clearly displayed on the large LCD display. The menu is available in many languages:  German, English, French, Dutch, Polish, Russian and Italian are available.

Training programs of the Kettler Skylon 4 elliptical trainer:

Quickstart: simply start training without having to make any major adjustments.
Manual training: design the training according to your own ideas.
Adjustable training goals for: time, distance, calories/ joules. Fast and easy

Kettler Advanced Training Computer of the Skylon 4:

  • Display: 117 x 86 mm (4.6″ x 3.3″)
  • Operation: rotary wheel and 2 operating keys
  • Tilt adjustment: For optimal viewing angle of the displays regardless of body height.
  • Tablet holder: Included
  • Menu languages: German, English, French, Italian, Dutch, Polish, Russian
  • Training data: time, speed, distance, pedal revolutions per minute, heart rate, energy consumption, braking level
  • Average values: During and after training
  • Storable user profiles: 4 + guest. Stored are personal data, personal training scope, last training, individual training profile
  • Connectivity: KettMaps via headtracking function. The current speed is simulated by the front camera of the used device (tablet/smartphone).

Mentionable Features

The motor-adjustable magnetic brake system and the large 20kg (44 pounds) flywheel mass together ensure a very nice and smooth motion sequence. The resistance adjustment takes place at the edge of the hand and is continuously adjustable from 0-15 steps.

The step distance is here again a special feature. Thus women with a smaller body size can train perfectly and without knee problems with the machine. A possible too large X position should then no longer be a problem. The heart rate is measured either by the hand pulse sensors on the hand grips or by the matching chest strap which is available from us as an accessory. We would recommend the belt. This is simply more accurate.

The two push rods are equipped with high-quality self-aligning ball bearings and all other joints have double ball bearings. This ensures a long service life of the elliptical trainer.

The grip ends of the two arm grips are ergonomically shaped and therefore fit very well in the hands. The firm treads allow a safe and firm stand with both feet. The Skylon 4’s folding system is easy and simple to operate. Unfortunately, the elliptical trainer is very heavy and can only be moved with difficulty. This should always be considered. Our tip. Simply leave the device standing all the time. It can be folded if desired.

Further high-quality features

The display with sweat-resistant plastic casing convinces especially by its size and design. The simple operation is carried out via a turn-push element. Of course, 6 training programs including a pulse-controlled program are already integrated in the cockpit. 4 users + 1 guest can save the following after the training: Data, last training and an individual training profile.

The following basic values are shown on the display:

Watt, training time, speed, distance, RPM, pulse, energy consumption and average values.

Technical measurements:

The following measurements were determined for the Kettler Skylon 4:
✔️ set-up dimensions: 214 x 68 x 170cm, L/W/H
✔️ Step length 500mm
✔️ The transmission ratio is 1:9

We would especially recommend this elliptical trainer to women. Very stable trainer with a wonderful flat run. For men, the resistance might not be enough with the maximum resistance setting. In this case, you should switch to the new Skylon 6.

We recommend the following accessories for the Skylon 4:

To protect your floor we would recommend cork mats. These are simply more robust than the underlay mats. You can get the mats in every  hardware store or online if you want. If your sweat is flowing extremely, you could also put the mat underneath. Parquet floors darken over the years. Please note this. It just doesn’t look nice if the underlay mat is taken away.

Important information about the construction and Assembly

The Skylon 4 box is quite large. Please free the Skylon 4 from the box first. All individual parts can then be transported very easily. This procedure has proved to be the best way to transport the Skylon 4. The assembly is completed in about 60 minutes. This is also easy to do for any person, no technical knowledge required. A good assembly instruction is enclosed. These should be worked through step by step.



Kettler APP – KETTMaps

New in this app is a head tracking function. This allows the device to simulate speed via the front camera – even without a Bluetooth connection. The Kettler Skylon 4 is only available in this version as it does not have an integrated Bluetooth interface.
The training app Kettmaps is perfectly suitable for phones and tablets. You can download it from the Apple Store and Google Play. The standard version contains 16 tracks and one interval training.

In our eyes the better solution is the paid Pro Upgrade. Here you can use up to 12,000 real videos. Please check the prices for the upgrade with the manufacturer. An online sharing platform ensures that new content is always available.
A big plus of the new warp maps is that the resistance/slope automatically adapts to the respective profile. This is not possible with this model.

Kettler Skylon 4 Elliptical Review Conclusion

Good robust model. Best suited for use three to five days a week. We recommend the Skylon to women as described above. Often the maximum resistance is a little too low for men. Then no meaningful interval training is possible. This is another great addition to the Kettler’s portfolio of cross trainers. Buy with confidence.

Summary of the Kettler Skylon 4 Elliptical Review

Technical Specifications of the Kettler Skylon 4
Model: Skylon 4 (7691-400)
User Weight Capacity: 330 Lbs (150 Kg)
Flywheel Weight: 44 lbs (20 kg)
Console: LCD Display
Heart Rate Control: hand pulse sensors + chest strap (sold separately)
Stride Length: 20 inches (50 cm)
Q-Factor: 4 inches (10 cm)
Training Metrics: Duration, Distance, Speed, Watts, RPM, Calories, Heart rate
Gear Ratio 1:9
Power Connection: 230 volts
Resistance control: Computer Controlled
Computer Interface: USB port allows interactive programming
Rise height: 12 inches (31 cm)
Foldable: yes

Check the other Kettler Ellipticals we have reviewed and can recommend:

Kettler Ellipticals
ImageNameStride LengthWeight CapacitySize (inches)PriceBuy
Kettler Unix 2 Elliptical w/Floor matKettler Unix 2 Elliptical w/Floor mat15330 lbs25 x 55 x 35 inches (65 cm x 140 cm x 90 cm)
Kettler Unix 4 EllipticalKettler Unix 4 Elliptical16150 Kg, 330 lbs56 x 22 x 60 inches (144 cm x 56 cm x 152 cm) Price: $1,299.00 (as of 25/02/2021 03:43 PST- Details)
Kettler Rivo MKettler Rivo M16110 Kg, 242 lbs51 X 25 X 63 inches (130 x 64 x 160 cm)
Kettler Mondeo P Crosstrainer 07852-760Kettler Mondeo P Crosstrainer 07852-76016150 Kg, 330 lbs59 x 21 x 61 inches (150 x 53 x 156 cm) Price: $1,299.00 (as of 25/02/2021 03:42 PST- Details)
Kettler Skylon 3 Folding Elliptical Cross TrainerKettler Skylon 3 Folding Elliptical Cross Trainer20150 Kg, 330 lbs80 x 26 x 67 inches (201 x 67 x 170 cm)
Kettler Skylon 5 Crosstrainer Model 2016Kettler Skylon 5 Crosstrainer Model 201620150 Kg, 330 lbs214cm x 62cm x 177cm, 84 x 24 x 70 inches
SKYLON 4 RECUMBENT - CROSS TRAINERSSKYLON 4 RECUMBENT - CROSS TRAINERS20150 Kg, 330 lbs84 x 27 x 70 inches (214 cm x 68 cm x 170 cm)
Kettler Unix E Elliptical TrainerKettler Unix E Elliptical Trainer16150 Kg, 330 lbs54 x 22 x 61 inches (138 cm x 58 cm x 155 cm)
Kettler Unix 10 EXTKettler Unix 10 EXT19330 lbs25.6 x 55.1 x 35.8 Price: $2,199.00 (as of 25/02/2021 03:42 PST- Details)
Kettler Skylon S Folding Elliptical Cross TrainerKettler Skylon S Folding Elliptical Cross Trainer20330 lbs79.1 x 26.8 x 66.9 inches (Length=201 cm, Width=68 cm, Height=170 cm)
Kettler ELYX 1 Front Wheel Cross Trainer - Off-WhiteKettler ELYX 1 Front Wheel Cross Trainer - Off-White20287 lbs56 x 17 x 35 inches


Price Range $1000 - $1500
Stride Length 20
Flywheel Weight 44 lbs
Max User Weight 150 Kg, 330 lbs
Drive Type Front Drive
Warranty 3 years parts and labor
Computer / Display LCD Display
Special Features Up to 4 user profiles, Compact and foldable
Dimensions 84 x 27 x 70 inches (214 cm x 68 cm x 170 cm)
Weight 216 lbs, 98 Kg
Shipping Weight
Item model number


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Expert Score 8.1
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