| What it is | Large bolt-on wall shape |
| Found in | Indoor gyms & competitions |
| Adds | Angle changes, 3D movement |
| Difficulty | Beginner to advanced |
A volume is a large, hollow geometric shape bolted onto an indoor climbing wall, over which smaller holds can be mounted. Volumes change the wall’s angle and shape, adding three-dimensional, often slopey climbing that demands body tension and creative footwork. They are a defining feature of modern competition and gym bouldering.
How you climb them
Treat their faces like slopers and slabs — maximise contact, keep core tension, and use smeary footwork.
Why they matter
Volumes reward balance and creative position over strength, which is why gym and competition bouldering rely on them.
Good to know
See all hold types.
Frequently asked questions
What is a volume in climbing?
A volume is a big hollow shape — often a triangle, pyramid, or curved form — bolted to a gym wall to alter its angle and contour. Smaller holds can be screwed onto it, and the volume's surface itself is climbed by smearing and pressing, adding three-dimensional movement.
How do you climb on volumes?
Treat the volume's faces like slopers and slabs: maximise rubber and skin contact, keep tension through your core, and use precise, often smeary footwork. Body position matters far more than grabbing, since volumes rarely offer positive holds.
Why are volumes hard to climb?
Because they offer few positive holds and reward balance, tension, and creative movement over strength. Their three-dimensional shapes force you to read unusual body positions, which is exactly why setters and competitions love them.
Sources
- Indoor climbing — American Alpine Club