Dumbbells and kettlebells have opposite storage problems. A dumbbell is long and flat-sided, so it wants a shelf with length. A kettlebell is a short, round, 16 or 24 kilogram lump with a handle that snags everything, so it wants a base and a ceiling.
I read the product pages for Rogue's modular Mass Storage and three REP units and its storage guide on October 17, 2026, and put them on one table. Nobody here has loaded any of them. This is a spec comparison, and a few of Rogue's numbers simply aren't published.
TL;DR: REP's tray and kettlebell racks are the cheapest way to store iron, from $209.99, but each takes 7.8 to 8.8 square feet. Rogue's Mass Storage takes 4.6 square feet at 14 inches deep and starts at $415. REP's rack-mounted shelf is the only option that uses no floor, and it only fits REP racks.
The Specs on One Table
| Unit | Price (Oct 17, 2026) | Size, in (W x D x H) | Footprint | Rating |
|---|---|---|---|---|
| REP 3-Tier Dumbbell Rack | $209.99 | 48 x 23.4 x 34.6 | 7.8 sq ft | 1,000 lb, 75 lb unit |
| REP Kettlebell Storage Rack | $231.99 (list $289.99) | 60 x 21 x 29.5 | 8.75 sq ft | 1,000 lb, 120 lb unit |
| REP 72 in Dumbbell & Kettlebell Shelf | $259.99 | 72 wide, mounts to a rack upright | no floor of its own | 750 lb per REP's guide |
| Rogue Mass Storage, 43 in build | $415 starter | 47 x 14 x 45.5 | 4.6 sq ft | "600+ lb" of plates, standard unit |
| Rogue Mass Storage, 70 in build | not listed | 74 x 14 x 72.5 | 7.2 sq ft | not listed per shelf |
Footprints are width times depth from the listed sizes, my arithmetic. Two caveats. The REP shelf page lists only price, width and mounting rules, with no depth or height, which is why that row is thin. And Rogue publishes one load number, for plates, not for dumbbell or kettlebell shelves.
Dumbbells: Tray or Shelf?
REP's3-tier tray rackis 48 inches long and 23.4 inches deep, with a 10 inch shelf depth and 42.5 inches of usable shelf length. REP says one rack holds a 5 to 50 lb set, two racks hold 5 to 75 lb or 5 to 100 lb, with the 95s and 100s on the floor. A 5 to 50 lb set in 5 lb steps, in pairs, is 550 lb of iron. It sits inside the 1,000 lb rating with room to spare.
That's the cheap option, and I'd buy it for a set that stays under 50 lb. If the set is saddle-style round dumbbells, oursaddle dumbbell rack guidecovers those instead.
Where does the shelf win? On floor. REP's72 inch Dumbbell & Kettlebell Shelfis $259.99, made from 11-gauge steel, and mounts to an upright on a 4000 or 5000 Series rack. A 5 to 100 lb set fits on four of them. It's a pre-order item, with shipping estimated from November 13, 2026, and REP says rubber-coated dumbbells aren't compatible. REP's storage guide lists a 72 inch shelf at 750 lb. Two rules apply: you need a REP rack, and you need patience.
Kettlebells: Where the Floor Goes
The kettlebell problem is weight density. A pair each of 8, 12, 16, 20, 24, 28 and 32 kg bells weighs 280 kg, or 617 lb, using nominal weights. REP'sKettlebell Storage Rackis rated for 1,000 lb, so it holds that set. It has two tiers, each 58.75 inches long and 9.75 inches deep, and the page doesn't say how many bells fit. At 9.75 inches deep the shelves look made for small and mid-size bells. Whether the heaviest ones sit flat is something the page doesn't answer, so ask REP before you buy.
REP's own shelf instructions are more specific. On the 72 inch shelf, you can stagger pairs of 8 to 24 kg, 12 to 28 kg, 16 to 32 kg, or 36 to 48 kg bells, with about 5.42 square feet of kettlebell surface.
At $231.99 on sale, the kettlebell rack is the cheapest dedicated option I found, and it has a lifetime warranty by REP's page, with an asterisk the page doesn't explain.
Rogue Mass Storage: Narrow and Modular
Rogue'sMass Storageis built for bumper plates and medicine balls first. The default $415 build is 43 inches wide, two bumper and medicine ball shelves, a third position empty. Dumbbell and kettlebell shelves are add-ons that mount over a bumper shelf, so one is required for installation. An a la carte shelf is $115, though the page doesn't say whether that price covers all three shelf types.
The attraction is depth. At 14 inches, it's 7 to 9 inches shallower than REP's freestanding racks, which matters in a hallway-width corner. Steel is 2 by 2 inch, 11-gauge. Wheels are an option, four 2 inch stem casters, which Rogue doesn't recommend for more than 3 connected units.
What's missing is the number you'd want. Rogue lists no per-shelf rating for dumbbells or kettlebells and no shelf price difference, and the starter build's only load figure is "600+ LBS in plates." I wouldn't load 617 lb of kettlebells onto a shelf whose rating I couldn't find.
Which One, For Which Room
If you own a REP rack and the floor is tight, take the 72 inch shelf and wait for November.
If you have 8 square feet of wall, the kettlebell rack or the tray is simply the cheaper decision. They're $209.99 and $231.99, against a $415 Rogue starter that doesn't yet include a dumbbell or kettlebell shelf. For one piece of dedicated iron storage, that's a gap of roughly $180 to $205.
If the room is narrow and you also own bumper plates, Rogue's 14 inch depth earns its premium, but check the shelf ratings with Rogue first.
My honest take: for most people in a spare room, buy the REP unit that matches the iron you own, and put it where the floor is already dead. Our10x10 ft layoutshows where a corner like that sits, andwhat to buy first for a home gymputs storage in its place in the order of purchases. Still deciding on the dumbbells themselves? Thebudget adjustable dumbbell guidecovers the version that needs no rack at all.