Anthony

Major Fitness, Mikolo and RitFit all-in-one trainers mostly use 2×2″ or 2×3″ uprights with 1″ holes, so 3×3″ attachments are out. Here is what does fit, why hole spacing matters, and which models are 1:1 instead of 2:1.

The Titan X-3 has 3×3″ uprights, 11/16″ holes and 6″ side spacing. Titan’s own X-3 pins are 5/8″, so here is how Rogue Monster Lite, REP PR-4000 and Hydra parts line up, and which Titan attachments are Bolt-Down only.

Hydra and Manticore use true 3×3″ (76.2 mm) tube, with 5/8″ and 1″ holes. Here is which Rogue, REP and third-party attachments cross over, where two-pin parts miss, and why 2.3″ racks stay separate.

The REP PR-5000 and Rogue Monster 2.0 share 3×3″ 11-gauge uprights, 1″ hardware and 2″ spacing, but not every part swaps. Here is what crosses over, what doesn’t, and how Ares 2.0 and the FM-6 compare.

The REP PR-4000 and Rogue Monster Lite share 3×3″ 11-gauge uprights and 5/8″ holes, yet many parts don’t swap. Here is what crosses over, what doesn’t, and how to check before you buy.

Monster and Monster Lite share a 3×3″ 11-gauge upright but use 1″ and 5/8″ hardware, so Rogue sells separate attachment versions for each. Here’s how to match them.

Home gym flooring compared on real prices: stall mats, rubber tiles, rolled rubber and foam. Find the right thickness, work out exactly how many pieces you need, and check your rack fits with our calculator.

Upright size is only one of seven things that decide whether a rack attachment fits. This checklist uses real requirements from Rogue, REP, Titan and Bulletproof attachment pages.