Marcy Pro SM-4903 Smith Cage | Perfect for any Home Gym

The Marcy Pro SM-4903 Smith Cage Home Gym is for serious workouts, with over 50+ exercises possible on this fantastic home gym to keep your workout session ever-changing and different.

The SM-4903 targets the whole body to build muscle. In addition, this fantastic home gym can add resistance bands to increase the intensity of your workout with a high and low dual crossover two-pulley system to target those chest muscles.

What makes the Marcy Pro SM-4903 Smith Cage Home Gym perfect is its universal design, which allows for additional attachments. In addition, a sealed ball bearing system has been built into the overhead pulley system to provide a smooth glide experience. The bench seat has four adjustment positions, while the backrest has 6 to give you flexibility throughout your workout.

Pulling the bench away from the cage separates the SM-4903 from other machines. Therefore, it will allow you to use free weights to target more muscles and provide a more rounded, balanced workout experience while also being compatible with a 7ft Olympic bar.

Learn more in my complete review below!

Marcy Pro SM-4903 Smith Cage Home Gym
Marcy Pro SM-4903 Smith Cage Home Gym

Product: Marcy Pro SM-4903 Smith Cage Home Gym

Price: For a great deal on this gym, merely go here on Amazon

Warranty 2 years limited

My rating: is 8/10

Affiliate Disclosure: As an Amazon Affiliate Program participant, I earn commissions on purchases made through links in this post. Full disclosure

Details and Specifications

  • Assembled dimensions cage: 86L x 73W x 85H inches (218L x 185W x 216H cm)
  • Assembled dimensions bench: 48L x 37W x 49H inches (122L x 94W x 124H cm)
  • Shipping weight: 390 lbs (177 kg)
  • Weight capacity:
    Maximum weight for the bench: 600 lbs (272 kg) (including user’s weight)
    Maximum weights for press bar: 300 lbs (136 kg)
    The sliding-weight trolley has a maximum weight of 300 lbs (136 kg)
    Maximum weight for pull-up bar and dip station: 300 lbs (136 kg)
    Maximum weight for bar catch braces and bar catches: 300 lbs (136 kg)
  • Compatible weight plates: Olympic & Standard
  • Possible exercises: 50+
  • Warranty: 2 years limited

SM-4903 Smith cage

Marcy Pro SM-4903 Smith Cage Home Gym

The main element of the Marcy Pro SM-4903 is the Smith cage. Its frame is heavy-duty steel tubing. The main upright posts and the upper and base bars feature a gray, corrosion-resistant paint finish, while the rear bars that serve as guides for the weight trolleys and the stability bars for the weight bar have a chrome finish.

The safety catches, as well as the catch bars on the opposite side, are painted red. The catch bars also have a rubberized layer to reduce a bar drop’s noise and prevent paint chipping.

The fully assembled Smith cage is relatively large. Its footprint is 86″L x 73″W (218 x 185 cm), while its height is 85″ (216 cm). Thus, the machine won’t fit in a room with a seven ′ ceiling, and you will need at least one foot of clearance above it to perform pull-ups correctly.

Also, the included lifting bar is seven feet long so you will need at least a few feet of clearance around the unit for safe usage and ease of access.

The rear base of the cage consists of a double bar with five-weight plate dividers. These dividers can also double up as push-up points if the cage’s rear is not close to a wall.

The cage’s top front bar comes equipped with a pull-up bar featuring curved lateral grips and parallel grips at the center so you can perform a wide array of pull-ups and chin-ups. This bar has a weight capacity of 300 lbs (136 kg).

Safety elements

Regarding safety elements, the Marcy SM-4903 cage comes with two catch bars, a set of two catch braces, and the safety catches of the Smith machine. These are all rated for 300 lbs (136 kg) weight capacity.

The cage’s rear upright posts have 12 adjustment positions, while the front posts have 11.

Marcy Pro SM-4903 Smith Cage Home Gym
Marcy Pro SM-4903 Smith Cage Home Gym

The catch bars’ highest adjustment holes are also approximately 56″ (142 cm) above floor level.

The dual sliding weight trolley system

Several pulley sets are on each side, considering that the Marcy Pro SM-4903 comes equipped with a dual sliding weight trolley system. The pulleys are made of heavy-duty nylon material and integrate sealed ball bearings for a smooth motion.

The cables are steel ropes tested for 2,000 lbs tensile strength to support more than the carriages’ specified weight capacity. In addition, each wire is coated with a layer of PVC material to prevent the scratching of the pulleys.

SM4903 Accessories

The Marcy SM-4903 includes a dip station attached to one of the upright bars in terms of accessories. In addition, it features two extended rubberized grips and has a weight capacity of 300 lbs (136 kg), like most other machine parts.

A set of two D-handles with rubberized grips come with the cage for the high and low pulley systems. This strength training system does not include a short bar for low rows or a lat bar. And finally, both the Smith bar and the weight trolleys have Olympic 2″ removable adapters with spring collars.


The Marcy Pro SM-4903 Smith cage system includes a multi-position bench. It offers six positions for the backrest and four positions for the seat. However, it is essential to mention that the backrest does not provide a decline position.

Marcy Pro SM-4903 Smith Cage Home Gym
Marcy Pro SM-4903 Smith Cage Home Gym

The bench is relatively large. Its footprint is 48″L x 37″W (122 x 94 cm), while its highest point is approx — 49″ (124 cm) when the backrest is at its most upright position. The bench does not attach to the cage in any way.

Its rear base is also equipped with two tiny wheels, while its front base has a short lifting handle, so you can easily remove it from the cage if you want to perform squats, pull-ups, or other exercises that do not require a bench.

The seat pad and backrest come cushioned with approximately 2.5″ (6.3 cm) foam padding and durable vinyl upholstery. The exact dimensions of the backrest and seat pad are not specified, but as a general idea, they are approx 14″ (35 cm) wide, offering plenty of support.

The bench’s weight capacity is 600 lbs (272 kg),  which includes the user’s weight and the barbell or dumbbells used for the exercises.

SM-4903 Weight Resistance

The Marcy Pro SM-4903 Smith cage has a dual sliding-weight trolley system. Each weight carriage will hold up to 300 lbs (136 kg) and 150 lbs (68 kg) on each peg. The pegs take Standard 1″ weight plates; however, each carriage has a set of Olympic 2″ adapters so that you can use Olympic plates as well.

The machine has two sets of upper pulleys and two lower pulleys. Therefore, you can perform a variety of crossover exercises. Each pulley side or each carriage offers a weight resistance of 2:1.

In other words, if you load one weight carriage with 100 lbs, you will benefit from a weight resistance of 50 lbs. So, you can have a maximum of 150 lbs (68 kg) weight resistance per arm when using the pulley system.

Possible Exercises

  • Pull-ups
  • Wide grip pull-ups
  • Muscle pull-ups

    Marcy Pro SM-4903 Smith Cage Home Gym
  • Behind head pull-ups
  • Cliffhangers
  • Chin-ups
  • Close grip chin-ups
  • Wide grip chin-ups
  • Hanging knee raises
  • Hanging leg raises
  • Lat pulldowns
  • Close-grip pulldowns
  • Behind head pulldowns
  • Dips
  • Low cable cross-overs
  • High cable cross-overs
  • Aerobic rowing
  • Kneeling rowing
  • Biceps curls
  • Triceps press downs
  • Incline presses
  • Horizontal presses
  • Single-arm chest presses
  • Wide grip chest presses
  • Close grip chest presses
  • Cable crunches
  • Cable twist crunches
  • Seated trunk rotations
  • Standing trunk rotations

    Marcy Pro SM-4903 Smith Cage Home Gym
    Marcy Pro SM-4903 Smith Cage Home Gym
  • Calf raises
  • Squats
  • Single-leg squats
  • Kneeling single-leg squats
  • Wide squats
  • Twisting squats
  • Jumping squats
  • Hip extensions
  • Hip adductions / Hip abductions
  • and more

Of course, some of these exercises require extra accessories. For example, to do rows, it is recommended to use a short bar. For standard lat pulldowns, you’ll need a pulldown bar. Also, you can use the bench for a wide array of dumbbell exercises.

SM-4903 Assembly and Maintenance

This Marcy Pro strength training system requires complete assembly. The task will take a few hours, but it is not that complicated. It is advisable to do this with the help of another person. The included manual provides clear assembly instructions and schematics.

Tools for assembly do not come with the gym. Therefore, you will need a set of Allen wrenches, two adjustable wrenches, and a rubber mallet.

It is advisable to periodically lubricate the guide rods of the lat attachment and the Smith machine’s guide tubes for maintenance. A bottle of silicone lubricant comes included. Other than this, inspect the machine occasionally to ensure no damaged parts and re-tighten any loose parts.


  • Heavy-duty steel construction;
  • 12 adjustment positions for the bar catches;
  • Dual sliding weight system;
  • Barbell included;
  • Olympic 2″ adapters for both the carriages of the pulley system and the barbell;
  • Five weight plate dividers on the rear base bars;
  • Heavy-duty nylon pulleys;
  • 2,000 lbs tensile strength steel cables with PVC sleeves;

    Marcy Pro SM-4903 Smith Cage Home Gym
    Marcy Pro SM-4903 Smith Cage Home Gym
  • Two anchors included;
  • Multi-grip pull-up bar comes included;
  • The removable dip station comes included;
  • D-handles included;
  • Bar catches and safety catch braces included;
  • Multi-position bench included;
  • Premium cushioning on the bench pads;
  • Transport wheels and handle on the bench;
  • 600 lbs weight capacity for the bench;
  • Over 50+ possible exercises;
  • Quiet operation;
  • Little maintenance is required.


  • No preacher pad attachment for the bench;
  • No leg developer for the bench;
  • Only 300 lbs capacity for the Smith cage (some users may want more);
  • The lat bar does not come with the machine.

Marcy Pro SM-4903 Smith Cage Summary

The Marcy Pro SM-4903 is a strength training system that includes a Smith cage, a dual overhead pulley system, and a heavy-duty, multi-position bench. It also has a pull-up bar and a removable dip station.

It offers the possibility to perform more than 50+ exercises. In particular, it’s excellent for beginners and mid-range lifters, perfect for any home gym setup. In all, it offers superb value for the price.

I hope you found this article helpful and informative. Would you please speak up if you have anything you’d like to share on the topic or any opinions about my website? I look forward to your comments, questions, and the sharing of ideas.

Please remember that you should consult your physician to determine if you have any medical or physical conditions that could risk your health and safety or prevent you from using the equipment properly. In addition, your physician’s advice is essential if you are taking medication that affects your heart rate, blood pressure, or cholesterol level.

6 thoughts on “Marcy Pro SM-4903 Smith Cage | Perfect for any Home Gym”

  1. Hello there, thanks for this thorough review. It was beneficial to read. I think the Marcy Pro SM-4903 Smith cage is the perfect piece of equipment for a home gym. This gym equipment has all it takes to build your body into an ideal shape. I think this is a home gym everyone should have.

  2. Wow! An excellent and thorough review of the Marcy Pro SM-4903 Smith Cage.

    For me, it is the perfect gym for home. A gym that offers the possibility to perform more than 50+ exercises, great for beginners and mid-range lifters, is outstanding!

    This Marcy SM-4903 offers real value for the price paid. I am going to start saving so that I can purchase this home gym in the future.


  3. This Marcy Smith Cage is a fantastic machine.  I particularly like the safety features.  Also, most machines like this do not allow for free weights, which can provide different increments to the sets.  It is a large machine.  I think it would be best to place this on a concrete floor as it seems it might be too heavy for just floor joists.  My son has a free weights gym in his garage, which I can use.  However, a pulley machine like this is much better on old joints.  You have got me thinking.  I will do some measuring to see if this might be a great addition to his home gym. 

    • Hi Anastazja, thanks for stopping by and sharing your thoughts with us. Would you please let me know if I may further assist you with exercise equipment? I’m always happy to help.

      Kind regards, Robert

  4. Thanks for your review of Marcy Pro gym. It does sound like it is large enough to fit in a garage rather than in the house. Marcy makes good exercise equipment so I would expect no less from this. It would be a blessing to have it at home to avoid making trips to the gym and needing to share the equipment with everyone else. You could use the gym whenever you wanted! Great review!

    • Hi Caroline, thanks for stopping by and sharing your thoughts with us. Would you please let me know if I may further assist you with exercise equipment? I’m always happy to help.

      Kind regards, Robert


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