REP® Smith Machine Rack Attachment

The Smith machine attachment is compatible with REP PR-4000 and PR-5000 series racks in both 80” and 93” height options.

It is not compatible with the Omni™ Rack or the Apollo™ Half Rack.

Yes. As long as there is no Ares 2.0, Ares 1.0, or Athena, the Smith machine can be installed on a 4-post rack.

Please note that crossmember length will affect ability to use safeties, compatibility with other attachments, as well as whether you install the Smith machine inside or outside of the rack. Use of non-REP Smith attachment safeties can be unsafe and will void your warranty. Stay tuned: We're working on an integrated Smith Machine Attachment safety.

Yes, the Smith machine installs easily on 6-post set-ups. However, those with a rack depth of 30" or less will not be able to use safeties or spotter arms inside the rack.

Use of non-REP Smith attachment safeties can be unsafe and will void your warranty. Stay tuned: We're working on an integrated Smith Machine Attachment safety.

This depends on your setup.

16" 4-post rack without a cable attachment: You can attach and angle the Smith machine.
16" 4-post rack with a cable attachment: The Smith machine will not be compatible.

16" + 16" 6-post rack with a cable attachment: You can attach and angle the Smith machine.

4000 series racks with a cable attachment: You will not be able to angle the Smith machine due to interference with the cable system trolley handles on the front uprights.
All other setups will allow for the 5 degree angle.

The Smith machine will integrate into existing 6-post set-ups of the Ares 2.0, Athena, Ares 1.0. It is not compatible with existing 4-post set-ups with an Ares 2.0, Ares 1.0, or Athena. REP is working on future solutions that will allow compatibility with 4-post racks. It is not compatible with either of these wall-mounted cable systems. REP is currently working on some options for future compatibility.

Compatibility varies by configuration. Depending where the Smith machine is placed, and your rack size, pull-up bar compatibility may be affected.

Yes. For this configuration, you will need the Smith Machine Front Extension Bracket (sold separately) as well Front Foot Extensions (FFEs). For FFEs, both the 2.0 and 1.0 variants will work. The Mini FFEs will also work, but the Smith Machine can only be angled to about 4 degrees. Note that this will not work with racks that have an Ares 2.0, Ares 1.0, or Athena as the trolleys would hit the Smith machine.

Yes, as long as the Smith bar placement allows sufficient clearance from stored plates. Weight storage compatibility depends on the rack depth and crossmember length.

Yes. During installation, you can choose from choose from a range of angles from –5 to +5 degrees, allowing you to tailor the bar path to your preferred lifting style and comfort. For some exercises, the angled bar path can help mimic natural joint motion, improving comfort and muscle activation while reducing strain on joints.

The Colorado Barbell knurl offers a medium depth and grippy knurling that works well for all exercises and won't tear up your hands. The Black Diamond knurl is slightly more aggressive and is best suited for individuals that prefer a little more grip. Both options are inspired by REPs premium barbells, but are specifically optimized for use on the smith machine. They both offer dual knurl markings (IWF / IPF) and a center knurl, making this Smith machine suitable for all exercises. 

The Smith machine is rated for 450 lb max loading. The bar weight is approximately 15kg. It has a larger diameter of 35mm versus a standard barbell that has a diameter of 28-29mm. REP engineering chose to use a 35mm bar diameter to allow for the bar to be both strong and lightweight. With a 15KG start weight and 450LB weight capacity, a standard solid barbell would have been way too heavy. With a larger diameter, REP is able to achieve both a lighter start weight and the strength needed for a high-performance smith machine. There is no counterbalance. REP has worked to lighten the bar enough so that a counterbalance was not needed and would only increase complexity and price of the product.

Compared to a standard barbell, the 35mm shaft diameter may been like it may be hard to grip. For the majority of exercises that involve pressing or the barbell resting our your back, the larger diameter actually feels better, as it helps spread the load out and lessens the pressure. For pulling movements, due to the larger diameter, the barbell will be slightly harder to hold onto than a standard barbell. However, for most smith machine exercises, we don't think most people will have issues. 

Premium linear bearings and ultra-tight tolerances ensure smooth and nearly frictionless bar travel.

When installed on the inside of a 6-post rack, depending on your crossmember depth, you will be limited on the use of spotter arms or flip-down / strap-safeties inside of the rack. For a 30" rack (4-post or 6-post), with the Smith mounted inside the rack, the best option would be to use Spotter Arms off the front upright. For a 41" rack (4-post or 6-post), as long as the Smith machine is placed close to an upright,  spotter arms will work both inside or outside the rack. In either case, when mounted inside the rack, flip-downs and strap safeties will not be compatible. Use of non-REP Smith attachment safeties can be unsafe and will void your warranty. The good news is that REP is currently developing a new safety option that would allow customers to place their Smith machine inside the rack and still use an external safety for free barbell work.

A Smith machine is good for beginners all the way to advanced athletes. Since the Smith machine has a fixed bar path and integrated safeties it’s a safer training tool than a free barbell, making it great for beginners or those trading alone. For advanced individuals, the Smith machine allows for increased hypertrophy as it can enable high muscle recruitment, activation and isolation, by removing the stability aspect from the exercise and really allowing the user to focus on the movement and target muscle. It also allows for a safer way to train to failure.

The Smith machine Attachment installs directly onto your rack using provided hardware. No rack disassembly is required, but it may help to loosen the upper and lower crossmembers to make installation easier.

REP is actively developing a full ecosystem of attachments that integrate directly with the Smith machine, expanding its versatility and functionality. Separately, the BYOB variant is also in development. Unlike an add-on, this version will feature a completely different setup—designed from the ground up to let you use your own barbell, specialty bars, or operate both sides independently with ISO handles. More details coming soon!

Yes. This will work with the 1.25” Standard, 1.25” Raw, and 2” Standard Pull-Up Bars.

For installation off the front of the rack, you will need to purchase the additional Smith Machine Front Extension Bracket, as well as a lower front foot extension. The Smith is compatible with the front foot extension 2.0, front foot extension 1.0, as well as the mini front foot extensions. Based on which front foot extension option is used, you will need to install the upper bracket in the right orientation. Refer to the assembly guide for your FFE version to ensure the extensions face the proper direction for a front-mounted Smith machine. Also, note that if you chose to use mini front foot extensions, your adjustable angle will be limited to only 4 degrees.

When your Smith machine is placed as close as possible to your front uprights, the plates on your Smith bar and cable trolleys share the same travel path. To avoid interference, move and lock both trolleys either above or below the range of motion you’ll use the Smith machine for so the plates on the bar won’t contact the trolleys at any point. Before lifting, run the bar through your full ROM with plates on to confirm clearances.

We always recommend wall-mounting or floor-bolting your rack for safety purposes and to get the best performance.

REP stands behind the quality and durability of our equipment. The frame and structural welds of this product are covered by a lifetime warranty, and the barbell is also backed by a lifetime warranty. Wear components—such as plastic liners, bearings, and similar parts—are covered for one year, consistent with our warranty for pop-pins, pulleys, bearings, and cables.