Before comparing Body-Solid GPRFT vs GPRFTS vs SPRFTS, there's one question that matters more than price or weight stacks: which power rack do you already own? These three functional trainer attachments are not interchangeable options for the same rack — the GPRFT and GPRFTS both attach exclusively to Body-Solid's GPR400 Power Rack, while the SPRFTS attaches exclusively to the SPR1000 Power Rack platform. Get that part wrong and the rest of the comparison doesn't matter.
Once you know which rack platform you're working with, here's how the attachments compare.
Quick Comparison Chart
| Model | Rack Compatibility | Price | Key Spec |
|---|---|---|---|
| GPRFT | GPR400 Power Rack | $1,495 | 600 lb. capacity, plate-loaded style |
| GPRFTS | GPR400 Power Rack | $2,795 | Two 210 lb. weight stacks, 2:1 ratio |
| SPRFTS | SPR1000 Power Rack | $4,250 | Dual 210 lb. stacks (upgradable to 310 lb.) |
GPR400 Rack Attachments: GPRFT vs GPRFTS
GPRFT Price: $1,495 | Weight Capacity: 600 lbs. | Product Weight: 190 lbs. | Footprint: 77"L x 74"W x 81.25"H
The GPRFT attaches to the GPR400 Power Rack and is rated for 600 lbs. of capacity without a built-in weight stack — it's the lighter, lower-cost entry point into functional trainer training on a GPR400.
GPRFTS Price: $2,795 | Weight Stacks: Two 210 lb., 2:1 ratio | Product Weight: 625 lbs. | Footprint: 77"L x 74"W
The GPRFTS is the stacked version of the same GPR400 attachment, adding two 210 lb. weight stacks running at a 2:1 ratio in place of the GPRFT's plate-based loading. Same rack, same footprint, same warranty tier — the difference is entirely in how resistance is loaded.
This is the real answer to "GPRFT vs GPRFTS weight stack": the GPRFT has no stack (600 lb. capacity, plate-style loading), while the GPRFTS adds dual 210 lb. selectorized stacks for $1,300 more. If your facility wants fast pin-selected resistance changes between users, the GPRFTS's stack format is the better fit; if you're comfortable loading plates and want to save on the upfront cost, the GPRFT gets you functional trainer capability on the same GPR400 rack for less.
SPR1000 Rack Attachment: SPRFTS
Price: $4,250 | Weight Stacks: Dual 210 lb. (upgradable to 310 lb.) | Product Weight: 672 lbs. | Dimensions: 91"L x 58"W x 92"H
The SPRFTS shares a name with the GPRFTS but is a different attachment built for Body-Solid's SPR1000 Power Rack platform, not the GPR400. It ships with dual 210 lb. weight stacks that can be upgraded to 310 lb., in a larger 91"L x 58"W x 92"H footprint that matches the bigger SPR1000 rack it's designed to pair with. If you already own or are buying into the SPR1000 platform, this is the functional trainer attachment built for it — the GPRFT and GPRFTS simply won't mount to an SPR1000 rack.
Best for: Facilities already committed to the SPR1000 Power Rack platform that want to add functional trainer capability with room to scale resistance up to 310 lb. stacks.
Which Functional Trainer Attachment Should You Buy?
Start with the rack you own or plan to buy. On a GPR400, choose between the plate-loaded GPRFT for a lower entry price or the stacked GPRFTS for faster resistance changes. On an SPR1000, the SPRFTS is your only compatible option among these three, and it comes with the largest footprint and highest stack capacity of the group. Don't mix and match based on price alone — rack compatibility is the hard constraint here.
Why Buy From Everything Gyms?
Everything Gyms is an authorized Body-Solid dealer for all three attachments, shipping free nationwide directly from Body-Solid's warehouse near Chicago. Every attachment carries the full manufacturer warranty, and our price match guarantee applies against other authorized Body-Solid dealers.
Frequently Asked Questions
What's the difference between the GPRFT and GPRFTS weight stacks?
The GPRFT has no built-in weight stack and is rated for 600 lbs. of plate-loaded capacity, while the GPRFTS adds two 210 lb. weight stacks running at a 2:1 ratio for pin-selected resistance.
Which power rack does the GPRFT/GPRFTS functional trainer attach to?
Both the GPRFT and GPRFTS attach exclusively to Body-Solid's GPR400 Power Rack.
What does the SPRFTS functional trainer attachment include?
The SPRFTS includes dual 210 lb. weight stacks (upgradable to 310 lb.) and is built specifically for Body-Solid's SPR1000 Power Rack, at $4,250.
How much does a Body-Solid SPR1000 functional trainer package cost?
The SPRFTS attachment for the SPR1000 platform is priced at $4,250, before factoring in the cost of the SPR1000 rack itself if you don't already own one.
Is a plate-loaded or weight-stack functional trainer attachment better?
It depends on your facility: plate-loaded options like the GPRFT cost less upfront and let you load exact plate increments, while weight-stack options like the GPRFTS and SPRFTS allow faster pin-selected resistance changes, which matters more in high-turnover commercial settings.
Know which rack platform you're building on? Compare full specs and pricing on the GPRFT, GPRFTS, and SPRFTS product pages to find the right functional trainer attachment for your rack.