2023 Updates – Moved all metric racks to their own sections, fixed errors, added a few racks.
You get a hold of a great power rack or squat rack, but then you find out that the company doesn’t make the attachments / accessories that you want.
No problem! You should be able to find a compatible attachment or accessory, as long as your rack is made with one of a few standard configurations.
Table of Contents
The 3 Compatibility Specs
The key specs are:
The tubing size of the uprights, as above, typically one of: 2″x2″, 2″x3″, or 3″x3″. Some companies actually use metric sizing and don’t advertise the fact. The tables further below lay them all out.
The hardware/peg diameter that fits into the holes in the uprights, as above. Varies from 1/2″ to 1″. Going by the peg diameter is more consistent across brands than the hole size that is cut somewhat larger than the peg.
The hole spacing in the uprights, ie: the distance between holes on center, as above. This is only applicable for attachments that use 2 holes, the second using a locking pin.
2″ spacing is becoming the standard. Some racks have Westside spacing, which is 1″ spacing at a certain height range for setting bench press safety bars just right, and otherwise 2″ spacing above and below that.
When Slightly Wrong Sized Attachments are Ok
An attachment can fit in a larger hole than it’s made for, but it will be able to wiggle and maybe tip down a little, depending on the snugness of the bracket that goes over the tubing.
Similarly, attachment brackets can fit onto slightly smaller tubing than what they were designed for. This can be less bad than the wrong peg size, because you can glue shims (UHMW plastic or wood) to the inside of the attachment’s bracket to make it fit. Some attachments work well enough even if they’re loose. Some don’t have enough pressure put on them to be a safety issue, like a battle rope anchor, but it could still rattle.
Lastly, the steel gauge (wall thickness) of rack tubing does not factor into compatibility. The tubes are fabricated to an outside diameter spec.
For fitting 3×3 attachments onto 2×3 tubing, or 2×3 attachments onto 2×2 tubing, an Etsy seller is making these adapters to fill the void in the bracket.
When You Should Not Use the Wrong Sized Attachments
I don’t recommend you use load-bearing attachments that don’t fit quite right, such as J-hooks, steel safety arms, or plate holders, unless you have a good way of retrofitting it to be snug enough. Use some common sense, visualize it, and you’ll get the idea.
Attachments Using 2 Holes
A large number of readers have asked about attachments that use a locking pin to secure the attachment into a second hole on the rack’s upright. If the hole spacing is the same, it’s fine. Normally the question involves a brand that uses metric hole spacing, in which case it is not compatible either direction with imperial (inches) hole spacing. As much as you want it to work, no, under most circumstances you won’t get the locking pin in. The difference is about 1/16″ on the first hole, and the difference widens with each successive hole.
If you’re thinking of foregoing the locking pin or buying a thinner one, and you have to ask for confirmation on whether it’s safe, you probably shouldn’t do it.
List of Power Rack Attachments by Size
Rogue has among the best and most consistent quality. Cheap Amazon-only brands, which I don’t like to list unless there are no other options, are the worst and might be unsafe. Most other brands are somewhere in the middle or sometimes as good as Rogue.
Not listed here are complex attachments and accessories that will not fit any other racks, such as those that mount on the top or bottom crossmembers or need the rack to be a specific width between uprights. Examples are special pull up bars or rack extensions.
Size categories ordered smallest to largest.
50x50mm Tubing, 16mm Pegs
Titan X-2 (discontinued)
The Titan T-3 Multi Grip Pull Up Bar is compatible with this rack (thanks TJ!).
2×2 Tubing, 5/8″ Pegs
Powerline PPR1000, Northern Lights Crossbox
50x50mm Tubing, 25mm Pegs
Titan Fitness T-2, Giant Lifting 2X Series
50mm is a hair smaller than 2″. These are generally compatible with 2×2 racks. However, 2×2 attachments using a second hole and hitch pin are incompatible.
|Titan Adjustable Monolift||$229.99|
|Titan Safety Straps Pair|
fits 26″ inside depth
|Titan Dip Bars Pair||$84.99|
|Titan Y-Dip Bar||$94.99|
|Titan J-Hooks Pair||$74.99|
|Titan Roller J-Hooks Pair||$94.99|
|Titan Sandwich J-Hooks Pair||$94.99|
|Titan 23″ Spotter Arms Pair||$104.99|
|Giant J Cups Pair|
(use code TWOREP for 10% off at Giant Lifting)
|Giant Dip Station||$89.99|
2×2 Tubing, 1″ Pegs
Powerline PPR200X / PPR500, Best Fitness BFPR100, Valor BD-7 / BD-33, Rep Fitness PR-1000 / PR-1050 / PR-1100, Fringe Squat Cage, Legend Fitness Varsity Series, Get Rx’d Pro Power Cage, Vanswe Power Rack, TDS 1000lb Power Squat Rack, Fitness Reality 810XLT, Amstaff DF1161A / TP006D (discontinued)
|Rep Dip Attachment||$79.99|
|Rep J-Cups Pair||$69.99|
(fits any rack that will take 5/8″ or larger pegs)
|Rep 9″ Plate Storage Pair||$29.99|
|Powerline Rope Anchor||$24.00|
For more on the strap safeties used as an alternative to traditional steel safety bars, see our article, Are Power Rack Safety Straps Safe?
60x60mm Tubing, 13mm Pegs
ForceUSA MyRack only.
60mm is 2.36″, way off from all imperial sized racks. These attachments might fit the metric racks in the next section well enough that take 16mm pegs.
|ForceUSA Plate Holders (4)||$49.99|
|ForceUSA Deluxe J-Hooks Pair||$79.99|
|ForceUSA J-Hooks Pair||$49.99|
|ForceUSA Dip Attachment||$79.99|
|ForceUSA Landmine Base & Handle||$79.99|
|ForceUSA Spotter Arms Pair||$99.99|
|ForceUSA Strap Safeties Pair|
fits 29″ inside depth
60x60mm Tubing, 16mm Pegs
Bells of Steel Residential Rack / Utility Rack / Light Commercial Rack / Brute Rack / Folding Rack / Combo Rack
60mm is 2.36″, way off from all imperial sized racks.
|BoS J-Cups Pair||$59.99|
|BoS Sandwich J-Cups Pair||$59.99|
|BoS Plate Storage Pegs Pair||$44.99|
|BoS Roller J-Cups Pair||$69.99|
|BoS Landmine Base||$69.99|
|BoS Y Dip Bar||$99.99|
|BoS 27″ Spotter Arms||119.99|
|BoS Lever Arms||$199.99|
|BoS Belt Squat||$308.00|
60x60mm Tubing, 25mm Pegs
Powertec WB-PR / P-PR (discontinued), Hulkfit Power Cage
60mm is 2.36″, way off from all imperial sized racks.
2.5×2.5 Tubing, 1″ Pegs
Valor BD-11 / BD-41, Amstaff TR023 / TR025 / SD1050
|Valor 12″ Safety Arms MB-H||$65.00|
|Valor Premium Bar Holders MB-G||$45.00|
|Valor Dip Handles MB-B||$59.00|
|Fitness Avenue J-Cups Pair||$29.15|
2×3 Tubing, 1/2″ Pegs
50x75mm Tubing, 16mm Pegs
Titan Fitness T-3 / T-6 (discontinued)
Slightly smaller than 2″x3″, and pegs slightly larger than 5/8″. Generally compatible with 2×3 racks except for attachments using a second hole, because of the metric hole spacing.
|Titan J-Hooks Pair||$74.99|
|Titan Sandwich J-Hooks Pair||$94.99|
|Titan Roller J-Hooks Pair||$104.99|
|Titan Safety Straps Pair|
fits 24″ or 36″ inside depth
|Titan 21″ Spotter Arms Pair|
requires 50mm hole spacing
|Titan Adjustable Lever Arms||$329.99|
|Titan Dip Attachment||$74.99|
|Titan Y-Dip Bar||$104.99|
|Titan Plate Storage 4-Pack||$94.99|
|Titan Battle Rope Anchor||$59.99|
|Titan Step Up Platform||$104.99|
2×3 Tubing, 5/8″ Pegs
Rogue R-Series (Infinity), FringeSport Kip Cage / 2×3 rigs (discontinued), Bolt Fitness Lightning Power Racks
price with Infinity retrofit kit
|Rogue J Cups Pair||$75|
|Rogue 20″ Spotter Arms||$155|
|Rogue Plate Storage||$30|
|Rogue Battle Rope Anchor||$35|
(15/16″ wrenches fit the head of a 5/8″ bolt)
|Fringe 24″ Safety Spotters Pair||$116|
|Fringe J Cups Pair||$98|
|Fringe Dip Bar||$104|
2×3 Tubing, 3/4″ Pegs
Sunny Health & Fitness Power Zone Power Cage
No other brands match this size. The attachments in the 2×3, 5/8″ peg section above should fit this rack well enough.
2×3 Tubing, 1″ Pegs
Fitness Reality X-Class Light Commercial Rack
No other brands match this size.
50x80mm Tubing, 16mm Pegs
Rep Fitness PR-3000 (discontinued)
75x75mm Tubing, 16mm Pegs
Griffin Fitness GR3 Lite, Rep Fitness PR-4000, Titan X-3
Slightly smaller than 3″x3″, and pegs slightly larger than 5/8″. Generally compatible with 3×3 racks except for attachments using a second hole, because of the metric hole spacing.
3×3 Tubing, 5/8″ Pegs
Rogue Monster Lite, Vulcan Flat Base Power Rack, Stray Dog Strength, Bells of Steel Hydra, Body Solid GPR400 / SPR500 / SPR1000*
* The Body Solid SPR1000 takes 5/8″ pegs facing the front/back, and 3/4″ pegs on the sides. Many of its attachments are made to fit the side holes, which are incompatible with any other racks.
Mark Buffalo wrote a guide on how to fit the Titan X-3 lat pulldown on a Rogue Monster Lite rack.
3×3 Tubing, 3/4″ Pegs
American Barbell power racks, EliteFTS Collegiate / R3
See the 3×3, 5/8″ section above for more attachments that will fit these racks well enough.
75x75mm Tubing, 25mm Pegs
Titan’s TITAN Series, Rep Fitness PR-5000, Griffin Fitness GR3, Giant Lifting 3X Series
Slightly smaller than 3″x3″, and pegs slightly smaller than 1″. Generally compatible with 3×3 racks. The attachments here with a locking pin using a second hole, such as spotter arms, can even sometimes fully fit on 3×3 racks because the smaller peg size somewhat makes the attachment drop a little lower and reach the slightly wider spaced hole to lock into.
There have been reports of Titan’s all-steel J-cups and UHMW-lined J-cups not fitting over 3×3 tubing.
3×3 Tubing, 1″ Pegs
Rogue Monster, Vulcan Strength Racks (except Flat Base Power Rack), Ethos Power Rack 1.0, Amstaff 370, Fringe 3×3 rig, Valor rig, Legend Fitness Performance Series, EliteFTS Scholastic Half Racks / Garage Power Racks, Get Rx’d Goliath rack, Sorinex XL Series, Bolt Fitness Storm Series, XM Fitness 365 Infinity Power Rack, PRx Pro, Prime Prodigy, eliteFTS Quick Ship Power Rack, Inspire Fitness FPC1, Fray Fitness Savage Series, Stray Dog Strength, Oak Club Manufacturing, Irwin Fitness
|Rogue Adjustable Monolift||$375|
|Rogue Adjustable Monolift 2.0|
uses side holes of tubing
|Rogue Monster Safety Straps|
fits 24″, 30″ or 43″ inside depth
|Rogue Ghost Strong Roller J Cups Pair||$225|
|Rogue Monster J-Cups Pair||$139|
|Rogue Monster Sandwich J Cups Pair||$255|
|Rogue 24″ Monster Safety Spotters 2.0 Pair||$325|
|Rogue Monster 50 Cal Trolley & Lever Arm||$1,170|
|Rogue Monster Matador||$185|
|Rogue 12.5″ Monster Plate Storage Pin||$47.50|
|Rogue 13″ Monster Plate Storage Channel||$105|
|Rogue Monster Landmine 2.0||$140|
|Rogue Monster Leg Roller||$120|
|Rogue Monster Articulating Handle Kit|
(1.5″ wrench fits head of 1″ bolt)
|Fringe 22.5″ Spotter Arms Pair||$199|
|Fringe J Cups Pair||$92|
|Fringe Plate Storage||$100|
|Stray Dog Strength Sandwich J Cups Pair|
Use code TWOREP10 for 10% off all Stray Dog Strength
|Stray Dog Strength Dip Attachment||$220|
|Stray Dog Strength Change Plate Storage||$89|
|PRx Pro 20″ Spotter Arms Pair||$175|
|PRx Pro Dip Station||$129|
Universal Fit Attachments
For a high and low cable system that works on almost any power rack, see the Spud Inc Pulley System shown above.
If you only need a high pulley (for lat pulldowns and tricep pushdowns), see Giant Lifting’s pulley system for a much lower price.
This Rep Fitness dip attachment above fits on almost any rack with 1″ round safety bars (thanks Anthony!). The rack needs to have at least 21″ depth between the front and back uprights, which is the case for all freestanding racks and most floor-mounted racks except the most shallow ones. The rack’s hole spacing does not matter, as the bottom part of the attachment simply rests against wherever the lower safety bar is.
There are a couple solutions for power rack strap safeties if you can’t find a match. If you can get a brand of them with brackets that fit your rack but the straps are the wrong length, get two 2″ Stren-Flex slings of the right length to replace them with. They are extremely strong, with pertinent info labeled and a chart on that webpage with the pound ratings.
Your second option is a pair of Spud Inc suspension straps that hang off your rack’s top crossmembers.
Rear Rack Extension and Foot Stabilizer Fit
Multiple questions on this in the comments prompted me to add this section.
You generally can’t add a rear rack extension – usually to accommodate weight plate storage – made for a different brand. The height of the holes off the floor and the rack width would have to be precisely the same.
Similarly, with extension feet meant to stabilize a rack, even if the tubing size and peg size are a match, the holes would have to be precisely the same height off the floor, or they would float and defeat the purpose.
I have heard reports of people using these across brands, but in every case it seems the user made some modifications to make it work. If you found a case where they are perfectly compatible, please leave a comment!
For the best compatibility going forward, I highly recommend getting a 3×3 rack taking 5/8″ pegs (Rogue Monster Lite compatible) or 1″ pegs (Rogue Monster compatible). Even you never buy a Rogue product, they lead the way in things like this.
Rogue appears to be in the beginning stages of abandoning their 2×3 racks in favor of 3×3. Other manufacturers have noticed and likely will follow suit. This doesn’t mean that nobody will make racks with 2×2 or 2×3 tubing. I believe that there will be a market for those lighter and cheaper racks for a long time, and they are not necessarily bad racks. The 3×3 attachments sell much better and are more numerous, because people who spend the extra money for a 3×3 rack are more likely to soup it up.
You might want to steer clear of racks that have metric sized tubing. That said, many people know what they’re getting into and choose to buy those.
Hello David! Great list! One correction: in the 3″ x 3″ section, the Giant Lifting 3x series power rack is also a 75mm box tubing, not true 3″. I emailed their customer service and they confirmed.
It would be useful to split the 3″ section into true 3″ and into 75mm sections!
Thanks, I’ll get that corrected!
I might take your suggestion and separate out the metric and imperial sizes into their own sections. I had them separated out like that at one point. I started combining them again with the idea that it might be more helpful because most (but not all) attachments fit well enough either direction to be usable. But of course there’s the 60mm ones that are nowhere near any imperial size, so maybe it makes more sense to be precise with all of them.
Interesting, this is a tough choice for me, it’s real frustrating that marketing copy that says 3″ with 2″ spacing is often incorrect, especially on racks that are so highly publicized like the REP and Titan racks. On the other hand, with one-peg utilities fitting on both, that’s real useful to know.
I wish people would standardize on the 3″ steel and have that be! I assume the problem is that overseas supply chain will provide cheap 75mm box steel tubing, while a 3″ box steel is a speciality item in europe and china?
Thanks for this incredible website BTW!
I guess the metric is either cost related or more common in Chinese factories. Then the US companies get sunk costs before they measure it and find out 3″ is nominal.
I am looking for a 43 inch cross member with 5/8 holes on inch centers, is there such a beast?
Will the Athena Cable system fit any other rack system, such as the Bells of Steel Hydra rack?
It looks cool, doesn’t it. I’m going to have to look into this. I bet there are people who have tried rigging it to other racks.
Are these actually tested or just based on measurements? I’m curious about the Titan Series Adjustable Lever Arms on a PRx Profile Pro. I recently got some Hulkfit lever arms that are 3×3 with 1″ peg thinking it would fit. Unfortunately, it seems like the powder coating on the PRx is pretty thick and makes it slightly over 3×3, while the Hulkfit arms’ bracket is pretty exactly 3×3. Worried about the same outcome with the Titan lever arms and have heard they have a pretty hefty restocking fee, so hesitant to test it out.