Fringe Sport Bob Smith Machine Power Rack Attachment Review

This product was in house tested by Michael at the Jungle Gym Reviews.

The Fringe Sport Bob Smith attachment is one of the most affordable ways to add a Smith machine to an existing rack without buying an entirely new machine. The biggest tradeoff is refinement—there’s noticeable play in the system and a few design choices that feel closer to DIY than premium equipment. It’s best for home gym owners who want Smith machine functionality at the lowest possible cost. If smoothness and precision matter more than price, you’ll likely prefer a more refined rack-integrated Smith system.

Quick Specs

Price: $599 (about $550 with coupon)

Weight Capacity: 700 lbs

Rack Compatibility: 3×3 racks with 1” or 5/8” holes, some 2×3 racks

Barbell Compatibility: 25–32 mm diameter (bring your own barbell)

Guide Rod Height: ~87–88” max

Lowest Bar Position: ~13.5–14” to bar center

Bar Path: Vertical only

Hardware Weight: ~13–15 lbs

Minimum Starting Weight: ~58 lbs with a 45 lb barbell

Mounting System: Keyhole brackets on rack uprights or front feet

Included Hardware: Magnetic pins for stops and latches

Optional Add-On: Bob Front Foot Extensions

Where to Buy the Fringe Sport Bob Smith Machine Power Rack Attachment

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My Real-World Experience

The Bob Smith attachment is built around a simple idea: give people a Smith machine that can work with almost any rack. That universality is the main reason it exists, and it’s also the reason it doesn’t feel quite as refined as rack-specific Smith systems.

Instead of including its own bar, this attachment uses a BYOB approach—bring your own barbell. The bar clamps into the two trolley brackets, which ride on guide rods using linear bearings. Once the bar is secured, it works the same way a traditional Smith machine does: rotate the bar slightly to unhook it, move vertically along the guide rods, and rotate again to re-latch.

One thing I noticed immediately is the amount of side-to-side tolerance in the system. There’s more movement in the bar than you’d typically feel on a commercial Smith machine. Once plates are loaded the movement becomes less noticeable, but it’s definitely present.

Training Use Cases

For home gyms that don’t have room for a dedicated Smith machine, rack attachments like this fill a useful gap. You get vertical Smith bar movement for exercises like squats, presses, lunges, and hip thrusts without adding another large piece of equipment.

One of the standout features here is the range of motion. Because the guide rods extend down close to the rack base, the bar can travel lower than many rack-mounted Smith attachments. I measured the lowest position at roughly 13.5 to 14 inches to the center of the bar, which is excellent for exercises that require deeper starting positions.

The attachment can also mount on either the front or back of rack uprights depending on your setup. That flexibility lets you keep your rack usable for traditional barbell lifts while still having the Smith machine available when you want it.

Tradeoffs & Limitations

The biggest compromise with the Bob Smith is refinement. The clamps that secure the bar use threaded rods and wing nuts, which work but require occasional tightening. Over time I noticed they could loosen slightly between sessions.

Another limitation comes from the two-piece guide rod design. The rods are split so the system can ship in a smaller package and fit different rack heights. That flexibility is useful, but it also creates a small joint in the rod that the trolley passes over each repetition. I could feel that transition point during some reps.

The system also has more lateral play than most Smith machines. While this doesn’t necessarily make it unsafe, it does make the movement feel less precise compared with higher-end Smith systems.

Value & Alternatives

At roughly $599—and often closer to $550 with coupons—the Bob Smith is one of the least expensive Smith machine rack attachments available. That price is its biggest advantage.

More expensive Smith attachments often integrate directly into specific racks and use smoother guide systems or counterbalanced bars. Those systems tend to feel more refined but also cost significantly more and usually work with only one rack model.

The Bob Smith takes the opposite approach: maximize compatibility, minimize price, and accept a few compromises along the way.

Who Should Buy This

Home gym owners who want an inexpensive Smith machine attachment that works with a wide range of racks.

Who Should Skip It

Lifters who prioritize smoothness, precision, and a premium Smith machine feel over price.

Final Verdict

The Fringe Sport Bob Smith attachment accomplishes exactly what it’s designed to do—add Smith machine capability to almost any rack at a very accessible price. It doesn’t have the refinement of higher-end systems, but for many home gyms the flexibility and affordability make it an appealing option.

Affiliate Disclosure

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