Tool · Measuring and buying

Rack attachment fit finder

Pick your rack system to see the maker's upright size, hole diameter, hardware size and spacing, the attachments it lists and excludes, and what is not published.

We may earn a commission if you buy through links on this page. How we make money

Short answer

Pick your rack system below to open its page: the maker's upright size, hole diameter, hardware size and hole spacing, the attachments the maker lists and excludes for it, and what no source publishes. Match an attachment to that page, not to a brand name or a tube size.

Choose your rack system to see the key facts and what fits. Each fact links to its source on the full page.

All rack systems

The numbers at a glance

Rack systemUpright sizeHole diameterPin and bolt sizeHole spacing
Rogue Infinity and R-Series (2x3)2 x 3 inNot confirmed5/8 in J-cup pinNot confirmed
Rogue Monster Lite racks3 x 3 in (RML-690)Not confirmed5/8 in bolts and fasteners (RML-690); 0.625 in pin on the Monster Lite Strap Safety System 2.0 bracketsNot confirmed
Rogue SML-2 Monster Lite squat stand3 x 3 in5/8 in, laser-cut5/8 in bolts, fasteners and J-cup pinsWestside: 1 in through the bench and clean-pull zone, 2 in above and below
Rogue RML-390F Flat Foot Monster Lite rackNot confirmedNot confirmedNot confirmedNot confirmed
Rogue Monster racks3 x 3 in (RM-6)Not confirmed1 in hardware (RM-6); 1 in pin on the Monster Safety Strap 2.0 and on the 1 in version of the Ghost Roller J-Cups 2.02 in (Rogue's general FAQ answer for Monster Series uprights)
REP PR-1000 and PR-10502 x 2 in (PR-1000)Not confirmed1 in pins on the 1000 Series standard J-cups2 in (PR-1000)
REP PR-11002 x 2 inNot confirmed1 in pins on the 1000 Series standard J-cups3 in
REP PR-40003 x 3 in18 mm, per REP's ISO arm FAQ (PR-4000 version of the arms)5/8 in hardware; 5/8 in pins on the 4000 Series Round Sandwich J-cups2 in, with 1 in within the bench zone
REP PR-50003 x 3 in27 mm, per REP's ISO arm FAQ (PR-5000 V2 version of the arms)1 in hardware2 in
Titan T-2 Series2 x 2 in26 mm in Titan's spec table; 1 in in its descriptionNot confirmed2 in on center; Titan says some sections between holes measure 1 in. Titan does not mark the T-2 as Westside.
Titan T-3 Series2 x 3 in11/16 in5/8 in pin on the T-3 J-hooks (JHOOK_T3, SKU 401348); 5/8 in (16 mm) pin on the pin and pipe safety; a 5/8 in quick pin listed on Titan's T-3 accessory pageWestside through the bench and clean-pull zone, 2 in above and below
Titan X-3 Series3 x 3 in11/16 in5/8 in (16 mm) pin on the pin and pipe safety; 5/8 in pin listed for the SNDJHOOK_X3 J-hookBolt-down uprights: Westside through the bench and clean-pull zone, 2 in above and below. Folding rack page: 2 in on center with Westside spacing throughout the front.
Titan TITAN Series3 x 3 in1 in keyholesNot confirmedNot confirmed
Bells of Steel 60 mm racks60 x 60 mm, labeled 2.3 x 2.3 in by Bells of Steel5/8 in (per Bells of Steel's Sandwich J-cup listing)Not confirmedNot confirmed
Bells of Steel Hydra3 x 3 in (Bells of Steel prints 76.2 x 76.2 mm)5/8 inNot confirmedNot confirmed
Bells of Steel Manticore3 x 3 in (Bells of Steel prints 76.2 x 76.2 mm)1 in, combined with a 5/8 in opening (keyholes)Not confirmedNot confirmed
PRx Profile ONE, PRO and CORECORE: 3 x 3 in. ONE and Fold-In ONE: 2 x 3 in. PRO: 3 x 3 in.5/8 in (CORE)5/8 in pin on Profile PRO spotter arms; Profile ONE pin size not statedCORE: 2 in on the front, 4 in on the side
Force USA MyRack60 mm, labeled 2.4 in square by Force USAAccessory holes 5/8 in (16 mm), as Force USA prints itNot confirmedWestside (no numeric pitch given)
Powertec power racks and half racks2 3/8 x 2 3/8 inNot confirmed1 in peg (Premium J-hooks)Not confirmed
Sunny Health & Fitness Power Zone racksNot confirmed3/4 in hardware peg hole (SF-XF9933)Not confirmedNot confirmed

How the data is built

Every value comes from the rack maker's own product pages, manuals and support answers, read on 2026-10-09, and each carries its source on the rack's page. Where no maker states a field, it reads "Not confirmed". We do not measure racks ourselves, and we do not fill gaps from reseller listings.

Why the rack system decides fit, not the brand

Makers state fit per rack line. REP says it cannot guarantee compatibility between REP items and non-REP items because of manufacturing and machining differences,[1] and that its warranties can be voided when its products are used with other companies' products.[2] REP also says it does not guarantee its Drop-In Dip will fit other brands' racks.[3] So the finder is organized by rack system, and each page lists only the attachments whose makers name it.

Conflicts are shown, not resolved

Makers' own pages sometimes disagree. Titan's T-2 support answers say T-2 racks are 12-gauge steel, while Titan's rack comparison page lists the T-2 as 14-gauge.[4] When that happens, the rack's page shows both figures. Ask the maker before you rely on either.

Exclusions are specific to the host

Some racks exclude attachments other racks in the same family take. Rogue states that band pegs and Safety Spotter Arms should not be used with its RML-390F Flat Foot Monster Lite rack.[5] Each rack page has an "Attachments the maker excludes" field for this.

What is not listed yet

Fitness Reality, Griffin and the folding Force USA MyRack have no rack pages yet, because we found no primary maker facts for them. If yours is one of these, measure it with the measuring guide, start from the tube with the upright size finder, and see how to identify your rack.

Next

Choose your rack system to see the key facts and what fits. Each fact links to its source on the full page.

All rack systems

Questions

My rack is not in the list. What now?

Measure the upright size, hole diameter and hole spacing yourself, then buy only attachments whose maker states those exact numbers. The measuring guide shows how; the upright size finder lists makers' sizes for each tube.

Why does a field say 'Not confirmed'?

Because no maker page, manual or support answer we read states it. We leave it blank rather than guess or copy a figure from a reseller.

Why are two different numbers shown for one rack?

Because the maker publishes both. Titan's T-2 support answers say 12-gauge steel, while its rack comparison page says 14-gauge; we show the conflict instead of picking one.[4]

Sources and changes

  1. Crossmember Multi-Grip Pull-Up Bar (REP Fitness) · Manufacturer · REP EU storefront: capacity, diameter, mounting, compatibility FAQ. · checked 9 Oct 2026
  2. Warranty Information (REP Fitness) · Manufacturer · REP Fitness US warranty table, region limits, third-party compatibility and modification terms. · checked 9 Oct 2026
  3. Drop-In Dip Attachment (REP Fitness) · Manufacturer · Compatible REP racks, capacity, mount, non-REP compatibility FAQ. · checked 9 Oct 2026
  4. Rack Accessories > T-2 Series (Titan Fitness) · Manufacturer · Titan support Q&A table for T-2 Series racks and accessories. · checked 9 Oct 2026
  5. RML-390F Flat Foot Monster Lite Rack (Rogue Fitness) · Manufacturer · Rogue RML-390F product page, including attachment restrictions. · checked 9 Oct 2026
  6. Power Rack Comparison (Titan Fitness) · Manufacturer · Upright size, gauge, hole size, Westside yes/no for T-2, T-3, X-3, TITAN Series. · checked 9 Oct 2026
  • : First published.

Next editorial review due 8 Jan 2027.