Best Carabiners for Bouldering

Bouldering doesn't use rope, so it doesn't really need belay carabiners. But a few small accessory carabiners are useful — for crash pads, chalk bags, and gear hauling. Here is what to buy.

Honest framing: Bouldering is a no-rope discipline. You do not need safety-rated locking carabiners for the climbing itself. What you do need is a few small accessory carabiners for clipping bags and gear together. If you are looking for belay carabiners for indoor lead climbing, see our locking carabiners page instead.

When Boulderers Actually Use Carabiners

Crash pad attachment

Crash pads have shoulder straps and waist belts, but most boulderers attach extra cargo (chalk bag, brushes, water, food) using a small carabiner clipped to a daisy chain or strap.

Chalk bag clip-in

Some chalk bags use a small carabiner instead of a sewn belt loop. Especially common with bouldering chalk buckets that get clipped to a backpack handle.

Hanging gear at the crag

A locking carabiner clipped to a bouldering pack lets you hang a chalk bag, brush stick, or shoes on a tree branch or fence at the crag.

Securing crash pad to a backpack

On long approaches with multiple pads or stacked pads, a carabiner secures the load reliably.

Hangboard hanging

Some climbers hang a hangboard from a beam using webbing and a locking carabiner. The carabiner makes the hangboard easy to remove between sessions.

Recommended Picks

Four carabiners that cover all the bouldering use cases above. None are belay-rated lockers — they are accessory biners optimised for clipping gear together.

Black Diamond MiniWire

$8-12

Tiny non-locking wire-gate biner — perfect for accessory clipping (chalk bag, brushes, hangboard cord). Cheap, light, durable.

Petzl Spirit

$10-15

Lightweight standard wire-gate. Slightly larger than the MiniWire — better for heavier loads or gloved-hand use.

Black Diamond Oz

$15-20

Asymmetric D-shape locking carabiner. Useful when you do want a secure locker for hangboard mounting or attaching gear to a tree.

Black Diamond LiteForge

$10-15

Slightly larger non-locking, easier to clip with one hand. A good "one carabiner for everything" if you only want one.

What to Skip

Belay-rated lockers (Petzl Attache, BD RockLock). Overkill for bouldering accessory use. Heavy and expensive for what you actually need.
Quickdraws. Used for lead climbing. Useless for bouldering.
Steel carabiners. Industrial-grade, heavy, completely unnecessary for any bouldering application.

More on Carabiners

Locking Carabiners Carabiners Explained Carabiner Shapes Locking vs Non-Locking Heavy-Duty Carabiners

More bouldering gear?

Browse our full bouldering gear category — crash pads, shoes, chalk bags, brushes.

Crash Pads Bouldering Shoes Chalk Bags

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