• Hand holding a blue boulder ball with a gray background
  • Boulder ball used in openhand grip
  • Two boulder balls, one blue and one green, with measurements and text on a concrete background.
  • Two boulder balls, one blue and one green, with measurements on a concrete background.
  • Two boulder balls with carabiners on a white background
  • Blue exercise ball with a carabiner on a white background
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BOULDER BALL - Open-hand Grip Trainer

BOULDER BALL - Open-hand Grip Trainer

Portable open-hand and wide-pinch trainer for building strength on slopers, rounded holds, and comp-style volumes.

Color: Deep Blue
$52.95 AUD
$52.95 AUD
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4.83 ★ (83)
Verified

Slopers. Volumes. Comp-style moves. Finally something to train them on.

A compact trainer for open-hand and wide-pinch strength, the grips modern setting leans on hardest. It builds the open-hand strength and wrist control that carries over to dynamic, rounded holds.

  • Built for slopers – one of few tools made for them. Rarely trained, and a weakness for plenty of climbers.
  • More than one trick – pull-ups, no-hang lifts, resistance training and warm-ups.
  • Packs small – 165g, light enough for home, the gym or the crag.

Specs: trains open hand and wide pinch · 165g · 12 kN carabiner included.

Pairs well with: Rock Ball or Pinch Rock.

3D-printed in North East Victoria in a plant-based biomaterial, by climbers who spend their days on granite.

Strength-training equipment. Not climbing protection. Not for use at height.

Shipping, Returns & Warranty

30-day returns on all products.
See Returns & Refund Policy.

Shipping is calculated at checkout.
Priority and express shipping available.
See Shipping Info.

Australia - GST included.
USA - Tariffs calculated at checkout.
Europe - VAT and import duties not included. See Shipping Policy.

Production, Materials & Colour

For our core range, we use advanced 3D printing, high-grade, plant based, bio material, and rigouros strength testing methods. This allows us to produce engineered gear with refined features, reliable strength, and dependable performance. For all other products we combine quality material choices with optimal pricing to create gear you can trust session after session.

Our packaging and mailing satchels are compostable to help reduce the use of conventional plastics.

Colours may vary slightly in presentation across different devices and between production batches.

Learn more on our Technical Info page.

Important Info for Young Users

Using crimp holds or performing no hang training incorrectly can lead to injury. Please refer to our article Info For Young Climbers.

Environmental responsibility

We use a plant based bio material for our 3d printed products. This is not a petroleum based plastic and does not harm the environment.
Our packaging and mailing satchels are compostable in your garden, or will biodegrade on their own. Even our packing tape can be fed to the worms!
Wherever possible we use environmentally responsible products.

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