We know choosing between a kBox, kPulley2, or LegExx can be tricky, but we are here to help you! Below, Fredrik Correa will take you through the selection process step by step. If you can’t find your answer here, you can click the button below and fill out the form and our product specialists will be happy to suggest the right solution for your needs.
- Choose the kBox if you focus mainly on squats, deadlifts, i.e. vertical exercises.
- Choose the kPulley2 if you focus mainly on rotations, pulls, i.e. horizontal and rotational exercises.
- Choose the LegExx device for a superior leg extension exercise with a focus on the quads.
- The main differences between kBox models are platform size, number of flywheels they can hold, and whether or not they include the kMeter feedback unit.
- kBox Active System: smaller kBox platform, two flywheels, no feedback system built-in (but kMeter ready).
- kBox Lite System: smaller platform but lighter than the kBox active, four flywheels, feedback system built-in.
- kBox Pro System: largest kBox platform, 4 flywheels (up to XL size), feedback system built-in.
Before we get into the details that differentiate one unit from the others, what unites them? All of our flywheel training devices boast the same:
- Premium quality
- Stainless steel shafts
- Auto-retract mechanism (for setting the drive belt length)
- Same flywheels and accessories
Whichever you pick, a flywheel training device will be a great investment for your strength and health. Moreover, in case you change your mind, Exxentric has a 30-day customer satisfaction guarantee that allows you to return the unit for a full refund on the device or a replacement unit. We’re only happy when you’re happy!
Why do you want to do strength training?
If you are fairly new to training, are active in recreational sports and other activities that aren’t primarily strength-focused, or view strength training to be complementary to your activity, we consider you to be at a fairly beginner level of strength development. In this case, you probably want to involve the lower limbs and focus on vertical exercises, which makes the kBox line the perfect solution for you. The kPulley2 is for mainly horizontal exercises like pulls, rows, flys, wood chops, etc., and is loved by many of our throwing and striking athletes (e.g, golfers, tennis, baseball, martial artists, etc.) If this sounds more like you, then the kPulley2 is the perfect solution. If you want to maximize your training results and are considering both units, check out our combo systems for medical, performance, and fitness.
If your focus is vertical exercises, the kBox Active is a perfect starting point. With the kBox Active you get the ideal blend of size, price, and resistance for an entry-level unit. You can load up to two heavy flywheels (which is a serious amount of inertia), meaning that if you’re planning to do training sessions of 8-15 reps, the kBox Active is perfect even for stronger users. If you want increased training room, the Active is also compatible with the foot block platform extension add-on that can add up to 10cm to the surface area. For even more advanced training, you can upgrade your kBox Active with our advanced flywheel knob and mount up to four flywheels, well enough inertia even for the most competitive powerlifters. The kBox Active is made of steel and is heavier than the other models.
The kMeter system is an electronic sensor that transmits training data to your smartphone so you can get instant feedback on your training.If you want to add it to your kBox Active and want the simplest option, just add it to your cart and we will mount it for you. If you can’t decide now, don’t worry. You can buy it separately and add it yourself, since it is quite easy to mount.
Want similar benefits at an even more attractive price point? Check out the kBox4 Active Legacy! A time-tested model that features many of the same benefits just minus the platform extension and the updated design – all for a maximally affordable price!
If data tracking and feedback is very important to you and you prioritize portability, then you should take a look at the kBox Lite. It weighs only 9 kgs and features a built-in kMeter. With the standard knob it can take up to four flywheels but with the advanced flywheel knob up to six. Like the Active, the kBox Lite is also compatible with the foot block platform extension, if you want to upgrade the training room. It’s weight makes the Lite the most common pick for users that prioritize portability like traveling athletes, trainers, or physios who tend to travel with their device. If you want the lowest weight, improved performance, and a middle-ground price point – kBox Lite is the answer.
Why the Pro? Mainly because it features the largest operating area and resistance of any kBox, while offering all the same benefits. While many can get excellent training on the smaller kBox platforms, especially when equipped with platform extension, a kBox Pro is the top choice for anyone looking to really max-out their flywheel training. In a clinical setting or in some sports teams, larger platforms can be necessary, in order to fit different people of different sizes, therefore the Pro becomes the obvious choice. You can also mount four flywheels (six with the Advanced Flywheel knob) up to the XL (extra large) size that only the Pro can handle. Basically, with the Pro, you don’t have to worry about any limitations. It is built out of aluminum, and it is just as heavy as the Active, therefore still portable. The majority of our professional users’ coaches, personal trainers, clinicians, or military customers go for the Pro.
Want to easily compare the features of all current kBox models? Check out the kBox Comparison Page for all the details!
When and why the kPulley2?
The kPulley2 device needs to be mounted to a solid attaching point, generally a wall. It is basically a flywheel training device with a beam. On the beam, you have a sliding pulley that allows you to change the direction and the height you want to pull from. You can pull straight out, upwards, or downwards in different angles and do all types of exercises such as tricep press, bicep curl and row to wood chops, rotations, and even a bunch of great leg exercises. There is of course some overlapping with the kBox but for a maximal range of different exercises, combining the kBox and the kPulley2 is a great combo. The kPulley2 device comes in one version only but in different colors, the Jet Black and Midnight Blue.
The ultimate leg extension device, whose sole purpose is to target the quadriceps muscle. Built on the same scientifically-proven flywheel technology, it ensures maximized hypertrophy by providing 100% muscle stimulation in the quadriceps. With the same flywheel-feeling, the LegExx is perfect for those who never skip leg day.
Want to compare the features of all Exxentric devices? Head over to the Product Comparison Page for all the details!
If you still have any questions, click the button below and fill in the form and get free expert advice!
Which accessories do I need?
After you have finally decided on a unit, you will then realize there are tons of different accessories to choose from… but don’t worry! All accessories are available for the unit you pick and you can always order more accessories at a later stage. Our advice is that you start with what you need and add the items you want at a later stage. If you are still unclear about what you need, here is some explanation of our accessories and what they are good for.
Want to increase the effective training area of your kBox Active or kBox Lite devices? The foot block add-on is compatible with both latest generation Active and Lite platforms and can expand the surface area by up to 10cm, when attached on both sides of your device. Enjoy training freedom and versatility that approaches that of the kBox Pro, at the portability or accessibility of the Lite or Active.
Critical to use your flywheel device, whichever you pick: the flywheels. They come in different sizes and weights but the important thing about flywheels is the inertia. The only thing to keep in mind when choosing the flywheels is what range of inertia you need (from light to heavy) and how big steps you can take.
The range varies from 0.005 (XS) kgm^2 to 0.070 kgm^2 (XL). The more inertia you have the higher the potential for force development is, although, in the end, it depends only on how hard you pull. Starting with S (small), M (medium) and L (large) flywheels work for most people. With the S (small) flywheel you have a low inertia starting point and therefore you can do upper body or fast movements. You can also add all the flywheels for heavier exercises. If you want to do a lot of the heavier exercises like deadlifts and squats maybe adding one or two L (large) flywheels extra can be good. Adding more than one of the S (small) or M flywheels isn’t really beneficial since 2xS equals an M (Medium) and 2xM equal an L (large) flywheel.
Both are designed to be connected to the kBox for vertical low limb actions like squats, split squats, calf raises, etc. The belt only loads from the waist down, which can be beneficial for those who have had previous back issues or can’t load from the shoulders down.
The harness allows you to use the hip extension more during squats movements, makes you perform better, and engages the glutes and the back more. If you are trying to produce a lot of force and power in the squat and improve this capacity maximally, the harness is a must. In other cases, it is a bit more open but we would say harness is standard if you intend to do a lot of lower limb squat-type exercises. The hip belt is an optimal choice if you want to unload your back.
Everybody needs a good Bar, as it is essential in flywheel training. With the kBar you can do tons of exercises like rows, curls, high pulls, deadlifts, and many front-loaded squat variations. Our kBar is super light, hence very pleasant to train with. Its lightness allows for all your energy to go into the flywheel instead of working against gravity for the maximal flywheel training effect. If you prefer an alternative to it, you might as well use a regular steel bar from a local store (or from an online store) that works just as well. If you have a 400+ lbs deadlift, investing in a long steel bar can be necessary.
Grips are great if you want to do single-arm exercises like single-arm rows but also great for some bilateral pulls in rows, high pulls, sumo deadlifts if you just want a V-shaped grip. Very comfortable and fairly inexpensive accessory. Exxentric recommended.
Wrap them around your ankles and use them in hip extension or leg curls, great exercises for posterior chain and glutes.
Allows you to set up the kBox for lateral movements (like lateral squats) to maximize glute training. Perfect for training for sports with the change of direction or skating type actions. Also great for a lot of sprint exercises like sprint start squats.
Combined tool for decline squats to target the quads (especially if used together with the hip belt) and calf training tool if you stand on the flat side. If you want quads and calves of steel or if you are doing rehab for achilles or patellar tendinopathy, this is your go-to accessory.
The elevation block lets you stand elevated, which can be great for a really deep squat if you are short or super flexible. They can also be used to increase range of motion in deadlifts and other exercises or put the focus on one side, for example in squat training after ACL surgery. By elevating the non-injured side you will work more with the other side, the leg that needs more training.
Working the neck muscles? The head harness is designed just for that.
Does your home gym look messy and you want everything in perfect order? Then we have both wall-mounted and free-standing accessory racks to stow away your equipment.
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