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

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. This fantastic home gym even has the option of adding 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. 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.

What separates the SM-4903 from other machines is that you can pull the bench away from the cage. This will allow you to use free weights to target more muscles and provide a more rounded, balanced workout experience while also been 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: 8/10

Amazon Affiliate Disclosure: I may earn commissions on purchases made through links in this post.

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 on top to reduce a bar drop’s noise and prevent paint chipping.

The fully assembled Smith cage is fairly 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 7′ ceiling, and you will need at least one foot of clearance above it to perform pull-ups correctly.

Also, the included lifting bar is 7′ long, so that you will need at least a few feet of clearance all 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 on it. 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

In terms of 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 a weight capacity of 300 lbs (136 kg).

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

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

Additionally, the highest set of adjustment holes for the catch bars is at approx 56″ (142 cm) above floor level.

The dual sliding weight trolley system

Considering that the Marcy Pro SM-4903 comes equipped with a dual sliding weight trolley system, several pulley sets are on each side. 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 much more than the carriages’ specified weight capacity. Each wire is coated with a layer of PVC material to prevent the scratching of the pulleys.

SM4903 Accessories

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

For the high and low pulley systems, a set of two D-handles with rubberized grips are (included). 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 small 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.

Both the seat pad and the backrest come cushioned with approx 2.5″ (6.3 cm) of foam padding and have 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 weight capacity of the bench is 600 lbs (272 kg). This includes the user’s weight, plus the weight of the barbell or dumbbells used for the exercises.

SM-4903 Weight Resistance

The Marcy Pro SM-4903 Smith cage comes equipped with a dual sliding weight trolley system. Each weight carriage will hold up to 300 lbs (136 kg), 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 you can use Olympic plates as well.

The machine has two sets of upper pulleys and two sets of 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 at least 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 are not (included), and 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, it is advisable to inspect the machine from time to time to make sure there are 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 included 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 set-up. In all, it offers superb value for the price.

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

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

  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.



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