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Smart 2.0 Belay Device

4.880952380952381 out of 5 stars
42 Reviews
Current price: $29.96 Original price: $39.95
25% off



Smart 2.0 Belay Device

Don't let a long day at the crag mess with the integrity of your belaying. With the Mammut Smart 2.0 Belay Device, you'll have the help of assisted braking on your side. This lightweight belay device is perfect for gym and sport climbing, especially on long days spend climbing and lowering at the crag. Built to handle ropes between 8.7 and 10.5 millimeters wide, the Smart works well with any HMS locking carabiner and lowers smoothly and securely even when you're a little beat up from the day.


  • A durable belay device for safer and smoother belays and lowers
  • Assisted braking offers extra layer of safety
  • Durable steel insert resists wear for longer last
  • Handles easily for smooth lowering and slack feeding
  • Works with any HMS locking carabiner for low profile use
  • Item #MAM011T
assisted braking
Rope Diameter
Recommended Use
Manufacturer Warranty
2 years

Overall Rating

5 based on 42 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 5 reviews
5 Stars - 37 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

January 6, 2024

10/10 Belay Device

I'm absolutely in love with the SMART. It's wonderful for top rope and leading all in the gym setting. I love the versatility, ease of use, and overall feel of this device. It combines the simplicity of an ATC with the extra help of a Gri-Gri without all of the extra weight. The Smart and other passive breaking belay devices are also ambidextrous which means it's great for left handed belayers. I carry it around almost daily for work and still looks like new.

Originally reviewed on

5 out of 5 stars

December 7, 2023

Lightweight and safe ABD

I use the Smart 2.0 belaying both top-rope and lead climbing. I really like how light it is, especially on a day that has a long approach hike! When paying out slack for a lead climber, it is pretty intuitive and smooth. I've recommended this to a few new climbers who were hesitating to pay the money for a gri-gri, but wanted the assurance of using an assisted braking device. The gri-gri has more use cases, but a novice climber on single pitch is unlikely to need many of them.

Originally reviewed on

4 out of 5 stars

November 9, 2023

Really great for lead

I really enjoy lead belaying with this. It has great control and it really does stop hands free (I don't do this) which is great for additional safety. It is not as smooth as a Gri-Gri for top-rope but it is definitely good enough. I have a Gri-Gri and I still use the smart 90% of time. The 4 stars is because it is not super smooth.

Originally reviewed on

5 out of 5 stars

November 8, 2023

Super convenient for lead climbing! Much easier to give rope out than an active assisted device.

Originally reviewed on

5 out of 5 stars

September 26, 2023

Great device

I don't own one yet, but at the COPE director training I went to at National Camp School, our instructors had us try out one of these. It was so smooth and easy to use. I'm definitely gonna pick one up for myself.

Laurel H

Originally reviewed on

5 out of 5 stars

September 23, 2023

Super simple and effective belay device

Nothin crazy about it, its super simple and feeds like an ATC but has the auto-catch. It also makes lowing super great and easy. Less diverse than an ATC in the fact I wouldn't rappel with it or use it on multi-pitch climbs but its fantastic for exactly what its made for, belaying from the ground. Much eaiser than a gri-gri and tons cheaper so it has my bet.

Originally reviewed on

5 out of 5 stars

August 26, 2023

Great cragging belay device

I've never been a grigri user but the low weight and cost of the smart drove me to give it a try. I couldn't have been more pleased on my first day of climbing with it. It takes a few minutes to get used to, but after that it was superior to an ATC in all ways for belaying on the ground. I'll be throwing it in my bag for any climbing outing where multi pitch is not the main objective.

Originally reviewed on

5 out of 5 stars

August 22, 2023

i think i like this more than the grigri

It's such a solid piece of equipment. It's able to feed rope better than the grigri, so I use it alot for just about all forms of rope climbing. however, a little too much use, and you'll start to develop blisters on the side of your thumb, but what's wrong with more callouses?

Originally reviewed on

5 out of 5 stars

May 18, 2023

Easy to use

This is easy to get used to and I prefer it to my grigri for that reason.

Originally reviewed on

5 out of 5 stars

February 9, 2023

My belay device of choice

I have a few different delay devices and this is my device of choice. No moving parts, it's self locking and easy to use. I find it very easy and fast to take and give slack when leading and always feel confident in the device. I have trained several people how to lead climb and most prefer the Smart 2.0 over other devices that I have.

Mike W

Originally reviewed on