A counter balanced Smith machine is a Smith machine that uses a hidden weight stack, spring, or cable and pulley system to offset the bar's own weight while you lift.
This guide breaks down exactly how that offset mechanism works, how it differs from a traditional fixed weight Smith machine, and who actually benefits from the lighter starting bar.
Quick Answer: A counter balanced Smith machine uses a hidden weight, spring, or cable and pulley system connected to the barbell so that a portion of the bar's own weight is offset throughout the lift, making the empty bar feel as light as roughly 0 to 15 pounds instead of the 35 to 45 pounds of a standard fixed weight Smith bar.
Key Takeaways
- Mechanism: A cable and pulley, or spring, system connects the bar to a hidden counterweight that offsets part of its mass throughout the lift.
- Weight difference: Effective bar weight on fully counterbalanced machines can run roughly 0 to 15 lbs, versus 35 to 45 lbs on a non-counterbalanced steel bar.
- Best for: Beginners, multi-user households, and anyone rebuilding movement patterns benefit most from the lighter starting bar.
- Trade-off: During very fast, explosive lifts the counterbalance cable can briefly go slack, temporarily reducing its offsetting effect.
- RitFit options: RitFit's M1 and M3 Smith machine lines both use a counterbalance system, so confirm effective bar weight on each product page.
What Is a Counterbalanced Smith Machine?
A counterbalanced Smith machine is a Smith machine that uses a hidden weight, spring, or cable and pulley system to offset part of the barbell's own weight as it travels along its fixed rail. That offset is what separates it from a standard, fixed weight Smith bar.
- Fixed bar path: The bar still travels only vertically or along a slight angle, guided by steel rails on either side.
- Offset weight: A counterweight, spring, or weight stack connected by a cable reduces how heavy the empty bar feels.
- Re-rack anywhere: Like other Smith machines, the bar locks into catch points on the rail so you can train without a spotter.
For the broader category context, see RitFit's What Is a Smith Machine guide. This article focuses specifically on the counterbalanced sub-type and how its mechanism changes the lifting experience.
How Does the Counterbalance Mechanism Work?
The counterbalance mechanism connects the barbell to a hidden counterweight through a cable that runs over a pulley mounted above the bar's highest travel point. As the bar moves down, the counterweight rises, and as the bar moves up, the counterweight drops, so its mass continuously offsets part of the bar's mass throughout the lift.[1]
- Cable and pulley: A cord or cable links the bar's carriage to the counterweight on the other side of an overhead pulley.
- Counterweight or spring: Some designs use a suspended weight, others use a spring mechanism inside the uprights, with the same offsetting goal.
- Carriage: The bar itself sits inside a carriage that rides the rails, and it is this carriage plus bar mass that the counterweight offsets.
Manufacturers vary in exactly how much of the bar's mass they offset, so two counterbalanced machines from different brands will not necessarily feel identical when unloaded.
How Is a Counterbalanced Smith Machine Different From a Traditional One?
A counterbalanced Smith machine feels lighter to lift than a traditional fixed weight Smith machine because part of the bar's mass is offset before any plates go on. A traditional Smith bar has no offsetting mechanism, so you feel its full steel weight from the very first rep.
| Feature | Counterbalanced | Traditional Fixed Weight |
|---|---|---|
| Unloaded bar feel | Roughly 0 to 15 lbs | Roughly 35 to 45 lbs |
| Best for | Beginners, multi-user homes, rehab style training | Lifters used to managing full bar weight from the first rep |
| Learning curve | Lower, lighter start for new movement patterns | Higher, full steel weight from the bottom position |
Effective bar weight figures come from an equipment buying guide, not a research study, and vary by manufacturer.
If your priority is heavier compound lifts rather than a lighter learning curve, RitFit's guide to the Best Smith Machine for Bodybuilding covers frame and loading considerations in more depth.
What Does Effective Bar Weight Actually Mean?
Effective bar weight is how heavy the empty bar actually feels once the counterbalance mechanism offsets part of its mass, and it can differ significantly from the bar's true steel weight. One buying guide notes the effective starting resistance on a fully counterbalanced Smith machine can run roughly 0 to 15 lbs before plates, compared with 35 to 45 lbs on a non-counterbalanced steel bar.
- True weight versus effective weight: The bar's physical steel weight does not change, only how much of it you feel.
- Check the spec sheet: Listing titles can be inconsistent, so confirm effective bar weight on the manufacturer's actual specification sheet.
- Plates still add real weight: Once you load plates, they add their full weight on top of the effective bar weight.
Check the specification sheet on a model like the Multifunctional Smith Machine to confirm its actual effective bar weight before you buy.
Who Is a Counterbalanced Smith Machine Best For?
A counterbalanced Smith machine is best suited to beginners, multi-user households, and anyone easing back into training after time off, because the lighter starting bar reduces the barrier to learning proper movement patterns. Researchers comparing Smith machine squats with leg press found greater quadriceps activation on the Smith machine, which they linked to its less constrained bar path requiring more trunk and lower-limb muscle recruitment than a fully fixed leg press.[2]
- New lifters: A lighter empty bar makes it easier to groove a squat or press pattern before adding real load.
- Multi-user homes: Households with lifters of very different strength levels can share one machine more comfortably.
- Rehab style training: Unloaded or lightly loaded movement practice is easier to control with the bar weight offset.
- Upper body work: Movements like shoulder press benefit from a bar that does not feel too heavy to start with.
For step by step form cues, pair this section with RitFit's What Is a Smith Machine Good For guide and the How to Do a Smith Machine Squat tutorial.
Does a Counterbalanced Bar Perform Differently During Explosive Lifts?
A counterbalanced bar can behave differently than a fixed weight bar during fast, explosive lifts, because the connecting cable can momentarily go slack when the bar accelerates faster than the counterweight can fall. In a study of ten highly trained sprinters, squat jump height was similar between Smith machine and free weight execution across loads from 40 percent to 120 percent of body mass, though the added benefit of a countermovement jump over a static jump shrank as load increased in both modes.[3]
- Slow, controlled lifts: The counterbalance mechanism tracks the bar smoothly and offsets weight as designed.
- Fast, explosive lifts: Momentary cable slack can briefly reduce the offsetting effect, so the bar can feel heavier at the top of a fast rep.
- Heavy compound lifts: Once plates are loaded, the frame's rated weight capacity, not the counterbalance detail, is what limits how heavy you can go.
For a movement that stays controlled and benefits from the lighter start, see RitFit's How to Do a Smith Machine Row tutorial.
What Are the Limitations to Know Before You Buy?
The biggest limitation of any Smith machine, counterbalanced or not, is that the bar travels on a fixed vertical or angled rail instead of the natural bar path your body would choose freely. This fixed path can force your joints into a squat or press pattern that does not match your individual proportions.
- Common mistake, assuming unlimited capacity: A counterbalance system only changes the unloaded feel, not the frame's total rated weight capacity.
- Common mistake, skipping the spec check: Listing titles vary, so always confirm effective bar weight from the manufacturer before buying.
- Common mistake, ignoring footprint: Counterbalanced systems often add internal components that can slightly increase the machine's overall footprint.
- Common mistake, ignoring cable tension for explosive work: If you train explosive lifts often, ask how the mechanism behaves under fast bar speeds.
See RitFit's How to Do Smith Machine Shrugs tutorial for another movement that works well within a fixed bar path.
Which RitFit Smith Machines Are Counterbalanced?
RitFit offers counterbalanced Smith machine options within its M series and multifunctional home gym line, each built around the same cable and pulley offset system described above. Confirm the current effective bar weight and frame rated capacity on each product page before choosing between them.
- Compact, beginner friendly option: The M1 Multi-Functional Home Gym Smith Machine (shown above) suits smaller spaces and lifters who want a lighter learning curve.
- Added cable stations: The M3 Power Rack Cable Crossover Smith Machine pairs the same counterbalance system with a dual cable crossover setup.
- Always verify specs: Effective bar weight and rated capacity can change between product revisions, so check the current listing before you buy.
"This is not the way to squat. We understand that the best path for the bar is vertical, but doing it on a Smith machine is going to force your verticality to happen in a way that you don't want it to."
Jeff Cavaliere, MSPT, CSCS, Athlean-X
FAQs About Counter Balanced Smith Machines
What does counterbalanced mean on a Smith machine?
It means a hidden weight stack, spring, or counterweight is connected to the bar through a cable and pulley system, offsetting most of the bar's own steel weight. Instead of feeling the full 35 to 45 lb bar weight before adding plates, you feel only a fraction of it, which makes the empty bar much lighter to lift.
Is a counterbalanced Smith machine better for beginners?
For most beginners, yes. A lighter effective starting weight makes it easier to learn movement patterns like the squat or shoulder press without struggling to control a heavy empty bar first, which also helps in multi-user households where lifters of very different strength levels share the same machine.
How much does a counterbalanced Smith machine bar weigh?
Fully counterbalanced bars can feel as light as roughly 0 to 15 lbs before plates are added, while non-counterbalanced steel Smith bars typically weigh 35 to 45 lbs on their own. Always confirm the actual effective bar weight from the manufacturer's spec sheet rather than the listing title.
Can a counterbalanced Smith machine handle heavy squats?
Yes, most counterbalanced Smith machines are rated for heavy compound lifts like squats once plates are added, since the counterweight only affects the unloaded bar feel, not the total weight capacity. Check the frame's rated weight capacity separately from the counterbalance detail before loading up.
Does a counterbalanced Smith machine work for bench press?
It works well for bench press, and the lighter unloaded bar can be especially helpful for lifters building pressing strength or working around an injury. During very fast, explosive pressing movements, the counterbalance cable can briefly go slack, temporarily reducing how much it offsets the bar.
Conclusion
A counter balanced Smith machine trades some of the traditional Smith bar's raw weight for an easier learning curve, without changing how the machine's fixed rail guides your bar path.
If a lighter, more forgiving starting bar fits your training situation, browse RitFit's Smith Machine collection to compare current counterbalanced models before you buy.
Disclaimer
This article is for general informational purposes and does not replace professional fitness or medical guidance. Consult a qualified trainer or healthcare provider before starting a new strength training program, especially if you have an existing injury or medical condition.
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References
1. Kompf J, Arandjelović O. Understanding and Overcoming the Sticking Point in Resistance Exercise. Sports Med. 2016;46(6):751-762. doi:10.1007/s40279-015-0460-2
2. Migliaccio GM, Dello Iacono A, Ardigò LP, et al. Leg Press vs. Smith Machine: Quadriceps Activation and Overall Perceived Effort Profiles. Front Physiol. 2018;9:1481. doi:10.3389/fphys.2018.01481
3. Loturco I, Mcguigan MR, Freitas TT, et al. Squat and countermovement jump performance across a range of loads: a comparison between Smith machine and free weight execution modes in elite sprinters. Biol Sport. 2022;39(4):1043-1048. doi:10.5114/biolsport.2022.112085
