Pick two or three power racks or cable functional trainers to see what they share and where they differ. For racks, it also shows which attachments fit each one. Every spec comes from the maker’s own pages. Where a maker doesn’t publish a number, the table says so.
Pick racks to compare
Rack hardware reference: four common options
These manufacturer specifications help narrow a search. Matching upright and hardware sizes alone does not confirm that an attachment fits across brands.
| Rack | Nominal upright | Hardware or hole specification | Hole spacing | Manufacturer source |
|---|---|---|---|---|
| Rogue Monster Lite RML-490 | 3 × 3 in | 5/8 in hardware | 1 in in the bench/clean-pull zone; 2 in elsewhere | Rogue RML-490 specifications |
| Rogue Monster RM-4 2.0 | 3 × 3 in | 1 in hardware; separate hole diameter not stated | 2 in, per the RM-4 FAQ | Rogue RM-4 specifications and FAQ |
| REP PR-4000 | 3 × 3 in | 5/8 in holes | 1 in in the bench zone; 2 in elsewhere | REP rack guide |
| REP PR-5000 | 3 × 3 in | 1 in holes | 2 in | REP rack guide |
The check date above applies only to this four-rack reference. The interactive dataset has its own verification date. Confirm dimensions, model year, clearances and anchoring with the maker before buying an attachment. Use the Rack Attachment Fit Checker to see conditions for a specific rack and attachment.
What this comparison covers
The tool compares rack lines, not every single height and depth combination. Where a line comes in several sizes, the table lists the options the maker offers. Every figure is quoted from the rack maker’s own product pages, spec tables or rack guides. Where makers disagree with themselves across pages, the conflict is listed at the bottom of the comparison rather than quietly resolved.
The specs that decide attachment fit
Upright size and hole size decide which attachments will physically mount. Hole spacing decides how finely you can set J-cups and safeties; 1″ spacing through the bench zone lets you set a bench press liftoff more precisely. Inside width and depth decide whether wide attachments, like belt squats and some pulley systems, fit between the uprights. The base type decides whether cable and lever attachments are safe to use, because many of them require the rack to be bolted down.
Comparing functional trainers
Switch to the Functional trainers tab to compare cable machines. The number to read first is the pulley ratio, because it decides how heavy the stack feels. On a 1:1 machine you feel the weight you select. On a 2:1 machine the cable travels twice as far and you feel about half the stack, before friction. That’s why a 200 lb stack at 2:1 can feel lighter at the handle than a 150 lb stack at 1:1. The Cable Pulley Ratio Calculator converts between the two.
What “not published” means
Some makers don’t list a rackable capacity, an inside width or a country of manufacture. The tool leaves those blank instead of estimating. If one of those numbers matters to your decision, ask the maker before you order.
Related tools
Already own a rack? The Rack Attachment Fit Checker shows which attachments from Rogue, REP, Titan, Bells of Steel and Bulletproof fit it. For the specs that matter most when you buy, see the Power Rack Buying Guide.