MRR Wall Stringer
A rack is only as solid as what it's bolted to. The MRR Wall Stringer is the foundation behind a proper wall-mounted MRR setup — a 1400 mm profiled steel plate that adapts the MRR bolt pattern to your wall and spreads the load of the rack across a large surface area for a connection you can trust.
The stringer's dense grid of mounting slots and round fixing holes lets you hit wall structure at almost any spacing, while the profiled 3 mm steel keeps the plate rigid across its full 1400 mm span. Two rows of Ø17 mm utility holes add genuine storage functionality — hang bands, belts, jump ropes, collars, or any standard hook-mounted accessory directly on the stringer. It's a mounting plate and a storage wall in one.
Compatible with Riot MRR, Riot Rig, and Original MRR.
Specifications
| Specification | Detail |
| Overall dimensions | 1400 x 290 x 33 mm |
| Usable inner length | 1167 mm |
| Steel thickness | 3 mm |
| Profile depth | 33 mm |
| Mounting hole diameter | Ø17 mm |
| Utility hole diameter | Ø17 mm (2 rows) |
| Hole pitch (close) | 25 mm |
| Hole pitch (wide) | 50 mm |
| Section spacing | 200 mm / 450 mm |
| Slot dimensions | 40 x 12 mm (oblong) |
| Material | Mild steel, black powder coat |
| Compatibility | Riot MRR, Riot Rig, Original MRR |
FAQ
What does the Wall Stringer actually do?
It bridges the gap between MRR components and your wall. Rather than mounting your rack uprights or rig directly to a handful of wall fixings, the Wall Stringer spreads the load across a 1400 mm plate with a dense grid of fixing points — giving you a far more robust and reliable wall connection. It also translates the MRR bolt pattern so everything lines up correctly, regardless of what's behind the wall.
Which products should I use it with?
The Wall Stringer is compatible with Riot MRR, Riot Rig, and the Original MRR. It's the recommended base for any wall-mounted MRR setup — particularly the Riot MRR Folding Crossmember system, where the stringer provides the solid backing needed to handle folding forces and repeated loading cycles. It's equally at home behind a Riot Rig or Original MRR installation where you want maximum confidence in the wall connection.
What are the utility holes for?
There are two rows of Ø17 mm utility holes running the length of the stringer. These accept standard storage hooks for bands, jump ropes, belts, collars, chalk bags, and mobility tools — turning the stringer into a storage wall as well as a mounting plate. You can also use them to attach other MRR items directly to the stringer if your setup calls for it.
How is it fixed to the wall?
The stringer's oblong mounting slots (40 x 12 mm) and dense round hole pattern give you plenty of options to hit studs, concrete anchors, or timber noggins at almost any spacing. The 1400 mm length means you can span multiple fixing points easily, and the profiled 3 mm steel keeps it rigid across the full span.
Does it come finished?
Yes — the Wall Stringer is black powder coated mild steel, matched to the rest of the MRR and Riot range.
How deep does it sit off the wall?
The profiled section is 33 mm deep, so the stringer sits just 33 mm proud of the wall surface before your uprights or rig brackets attach to it.
Does the Wall Stringer come with wall fixings/wall anchors?
No — wall fixings are not included. The correct fixings depend entirely on your wall construction: timber stud walls, solid brick or block, concrete, and drywall over steel frame all require different anchors, bolt sizes, and load ratings. We recommend having the installation assessed by a qualified person who can specify the right fixings for your wall type and confirm the fixing points can handle the load. The stringer's slot and hole pattern is designed to give maximum flexibility to hit solid structure whatever your wall spacing.