Black Diamond Circuit Z Review: A Compact Z-Fold Bouldering Pad for Circuits and Small Cars

Introduction

The Circuit Z is part of Black Diamond’s current bouldering pad range, and its name explains most of the idea behind it. It is built for working bouldering circuits, and it folds into the shape of a Z. That second detail matters more than it first appears, because a Z-fold pack carries the coverage of a much larger pad while collapsing into a footprint small enough for a compact car boot.

The numbers are straightforward. The Circuit Z offers 152 cm by 101 cm of landing coverage, and when it is folded up it measures roughly 50 cm by 101 cm by about 32 cm deep. Total weight is 5.5 kg.

Who the Circuit Z Is For

This pad suits climbers who move between problems and want a single pad that is easy to carry and easy to store. Anyone who has driven to a crag in a small car with a small boot will recognise the problem it solves: many large pads use a single fold, and a single fold does not always fit. The Z construction gives you the coverage without demanding the space.

It also makes sense for climbers who already own a larger pad and want something smaller for trad climbing, where a compact pad tucks into tight spots and travels easily alongside the rest of a rack. Because the pad is designed to work with the other pads in the range, it fits neatly into a modular setup rather than replacing it.

If your priority is a pad you can carry on your back between problems without rearranging your whole kit, the Circuit Z is aimed squarely at that use case.

Build Quality and Materials

The padding is closed-cell foam, cut to a thickness of 10 cm. That is not the thickest foam on the market, but the construction is tuned to work well at this size and helps keep the overall weight down.

The face fabric is 900 denier nylon, which is a genuinely robust specification for a pad that will be dragged over rock, gravel and grit. On top of that, Black Diamond applies a PU coating, so the surface sheds water and dirt more effectively than an uncoated fabric. The coating is also PFAS free, which keeps the pad clear of forever chemicals.

Coverage, Protection, and Portability

For a pad that packs down so small, 152 cm by 101 cm is a generous landing zone. The practical benefit shows up on uneven ground. Because of the Z construction, the pad can be laid across obstacles and voids rather than only sitting flat on a clean surface, which means you can build a more reliable landing under problems where the ground is not cooperative.

At 5.5 kg the pad is not featherweight in absolute terms, but it is light relative to much larger pads with comparable coverage, and it is comfortable to carry on approach.

The combination of a large flat area and a compact folded shape is the core of the design, and it is the reason the pad travels so well between problems and between crags.

Carrying, Straps, and Setup

The carry system is deliberately simple and effective. There is a grab handle positioned for hauling the pad between problems and a second handle on the side, which makes repositioning the pad under a boulder much less awkward than dragging it by a strap.

Shoulder straps come as standard, and the pad also includes a waist strap, a detail not every pad offers and one that makes a real difference on longer walks in. Small velcro tabs on the side hold the pad flat once it is folded out under a landing, so it stays put instead of creeping open and drifting out of position.

The Capsule 20 Companion Bag

One trade-off of a pad that folds this tightly is storage. There is not much room to shove your gear inside the folded pad the way many climbers do with a bulkier design.

Black Diamond addressed that directly with the Capsule 20, a small companion bag shaped to sit on top of the folded pad and strap down over it. It includes internal dividers, so rock shoes, a chalk bag and a guidebook each have their own pocket, plus a key clip for the small items that usually go missing at the crag. When you would rather not mount it on the pad, the handle lets you carry it over your shoulder, and it works perfectly well as a gym bag on indoor sessions.

Together, the pad and bag cover the two jobs a bouldering setup needs to handle: protecting the landing and keeping your kit organised while you move between problems.

Things to Consider Before Buying

The 10 cm foam thickness is worth thinking about if you regularly climb over sharp or particularly unforgiving landings, since thicker pads exist. The construction is designed to make the most of that depth at this size, but the specification is what it is.

Gear storage inside the folded pad is limited by the close Z-fold, so if you like to cram everything into the pad itself, budget for a separate bag or plan to carry your kit differently. Weight is also a consideration: 5.5 kg is light for the coverage on offer, but it is not a ultralight figure in isolation.

Buying Advice

The strongest argument for the Circuit Z is the ratio of coverage to packed size. Coverage of 152 cm by 101 cm in a package that folds to roughly 50 cm by 101 cm by 32 cm is a lot of landing area for a pad that disappears into a small boot, and many pads on the market are significantly more expensive for what they offer here.

Its modular design is the second argument. If you already own other pads in the range, the Circuit Z slots into the system rather than competing with it, and you can strap pads together for larger sessions. For climbers with limited car space, a mixed trad and bouldering habit, or a preference for travelling light between problems, this is a well-considered choice.

If your situation matches those priorities, the Circuit Z is easy to recommend on the strength of its coverage, its packed size and its robust materials.

Conclusion

The Black Diamond Circuit Z is a compact, modular bouldering pad that trades a little foam thickness and internal storage for a genuinely large landing area in a very small folded package. The 900 denier nylon face fabric, PFAS-free PU coating, waist strap and side velcro tabs all point to a pad designed by people who actually carry pads. For climbers who value a small boot footprint and easy transport, it makes a great deal of sense.