Sum
Description
Self-braking belay device
Safe, for all your sport-climbing ropes, resistant, ergonomic, dynamic, light and easy to use! Sum is a new generation belay device/descender designed to belay the first and the second in sport-climbing routes or climbing-walls: You can give rope fast and easy without touching the lever. Its symmetry makes it as good for left-handers. Dynamic braking which gives good absorption for the first-ascender. It is very simple way to put in the rope. It comes with a “Belay Positioner” which assures that de carabineer always works in the correct position. Special uses: Rescue, Zip-lines, Ascender, Abseil.
Self-braking belay device
Safe, for all your sport-climbing ropes, resistant, ergonomic, dynamic, light and easy to use! Sum is a new generation belay device/descender designed to belay the first and the second in sport-climbing routes or climbing-walls: You can give rope fast and easy without touching the lever. Its symmetry makes it as good for left-handers. Dynamic braking which gives good absorption for the first-ascender. It is very simple way to put in the rope. It comes with a...
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Device Type |
Brake Assist - Mechanical |
| Weight (g) |
260 g |
| Belay Brake Assist |
Yes |
| Rope Options | 1 rope only |
| Guide Mode |
1 follower only |
| Teeth |
No |
| Rope Range (mm) | 9.1 mm - 10.5 mm |
| Certification |
|
No reviews yet.
In conclusion, the SUM is pretty much a Grigri clone -- it handles any single-line technique just as well as its papa device. If you prefer thick ropes, I'd stick with the Grigri. On the other hand, if you're one of the new breed of sport climbers working long, difficult routes, where the weight of your redpoint cord really matters, the SUM, which should hit U.S. retail shelves this fall, is your tool.
The SUM ranks lower than the Grigri 2 simply because it isn't as smooth to operate, although with practice it does work nearly as well.
This video shows instruction to use Sum belay device correctly, a must watch video.