We handed ChalkBlaster to pro climbers. Here's everything they hated.

We gave the first ChalkBlaster to pro climbers and asked them not to be polite. They weren't. Too loud, too heavy, confusing button, overpriced, the power bank is useless, it only makes sense on a pole. Every line of that list became a design goal for ChalkBlaster V2: smaller battery, quieter motor, more compact, one simple control, built for the telescopic pole, and made for mass production at a lower cost.

Paul Ménager
Paul Ménager Oct 23, 2026 · 3 min read

Paul and Kent from SWEEP Climbing with a pro climber holding a ChalkBlaster in front of a bouldering wall

Paul and Kent from SWEEP Climbing with a pro climber holding a ChalkBlaster in front of a bouldering wall

TLDR

We gave the first ChalkBlaster to pro climbers and asked them not to be polite. They weren't. Too loud, too heavy, confusing button, overpriced, the power bank is useless, it only makes sense on a pole. Every line of that list became a design goal for ChalkBlaster V2: smaller battery, quieter motor, more compact, one simple control, built for the telescopic pole, and made for mass production at a lower cost.

Before ChalkBlaster V2 existed on a screen, it existed as a list of complaints. We handed the first version to pro climbers and told them not to be nice. They took us at our word, and most of what's different about V2 traces back to that list.

What they said, word for word

"Great for outdoor bouldering." That was the nice one. Then: "Too confusing, double click, long press, what?" "Power bank feature? Useless." "Heavy and bulky." "Too loud." "Overpriced." "Needs the extension pole to make sense." "Might hurt air quality in gyms." "It's overpowerful."

Brutal. But that's the point. Building a product isn't about getting it right the first time. It's testing, breaking, learning and rebuilding, and you can't do the learning part if the people testing it are being polite.

9
pieces of pro feedback on the first ChalkBlaster, one of them positive. The other eight became the V2 design brief.

How each complaint became a V2 decision

Heavy and bulky, too loud, overpowerful. Three complaints, one root cause: the first ChalkBlaster carried more battery and more motor than most climbers need in the hand. V2 gets a smaller battery, a quieter motor and a more compact body. We've since written about the air intake design that makes it quieter in this post, and about the I-shape layout that makes it compact in this one.

Confusing controls. Double click for this, long press for that. V2 is designed around one simple control that you don't have to learn. Intuitive to use is one of its four non-negotiables, and it came straight from this feedback.

Needs the extension pole to make sense. Fair. Routesetters and anyone cleaning high holds use ChalkBlaster on a telescopic pole, so V2 is built specifically for pole mounting rather than treating it as an add-on.

Overpriced. V2 is designed for mass production at a lower cost from the first drawing. The first ChalkBlaster was assembled by hand in small batches, and the price reflected that. Scale is the only honest way to bring it down.

The power bank feature, nobody asked for it, so it's not on the V2 list. And on gym air quality, we agree it matters, which is why Kent wrote a whole post on it.

What pros said vs what ChalkBlaster V2 does
They said

Heavy, bulky, too loud

Confusing button

Only makes sense on a pole

Overpriced

V2 does

Smaller battery, quieter motor, more compact

One simple control

Built for telescopic pole mounting

Designed for mass production at lower cost

What this means on the wall

The ChalkBlaster V2 that reaches you is the one pro climbers already argued with. Quieter in the gym, lighter in the hand, obvious to switch on, and ready for a pole when the hold is three metres up. We think it will be ten times the tool the first one was, and the credit goes to the people who told us the first one wasn't good enough.

Community

Satone, pro climber, tested the first ChalkBlaster and gave us feedback and support when it counted. Thank you.

Paul: "Brutal. But that's the point. Building products isn't about getting it right the first time. It's about testing, breaking, learning, and rebuilding."

Quick answers

Is the first ChalkBlaster too loud for a gym?
Some pros thought so, and we listened. V2's air intake and motor are designed for less noise than V1. If you have a V1, short bursts between attempts keep the peace.

Will V2 still work handheld, or only on a pole?
Both. It's built so the pole mount is a first-class use, not a compromise, but it's a handheld brush first.

Does the "overpowerful" complaint mean V2 is weaker?
No. High air velocity stays a non-negotiable. V2 puts that power in a smaller, quieter package.

SWEEP Climbing builds tools for climbers who take friction seriously.

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