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Rated 5 out of 5 by from Great all around cramp-ons Grivel makes some of the best ice climbing gear, hands down, and the G-12 cramp-ons are no exception. These are a great all-around cramp-ons. Their chromoly-steel construction holds up great in mixed ice and rock climbing and they grip incredibly well. I've used mine in the Cascades in mixed climbing conditions as well as in heavy snow pack in the San Bernardino Mountains in Southern California. So far they've held up perfectly in both scenarios and their bindings secure them to your boot comfortably (mine fit perfectly to my size 11.5 boot). The Anti-Bot mechanism is also very handy in preventing snow buildup when trudging along through fresh wet snow.
Date published: 2013-12-27
Rated 5 out of 5 by from The Best Crampons on the Market I used to use the Grivel 2F and was real bummed that when it was time to replace them that they were no longer available. I then purchased G12's and I absolutely love everything about them. The strap system with the heel lock is easy to use and the crampons feel secure to my boots. The antibots are great as snow no longer balls up under the crampon which is inconvenient and dangerous. They weight does not bother me because it makes me feel that these crampons are durable. I belive these will last many years!
Date published: 2011-05-19
Rated 5 out of 5 by from awesome traction, easy to use After trying a few Black Diamond offerings, I felt this was the best solution for my Alpine Boots. The higher-end Black Diamonds always require a lot of adjustment (the toe lock was a pain). These go on easily, stay put and keep you put on the ice.
Date published: 2013-01-24
Rated 5 out of 5 by from I love my G-12s I got lucky with some sort of pricing mistake and ended up with these when I was just browsing. I have since taken them up the Matterhorn, all over the White Mountains (NH) and vertical Ice climbing. They are excellent "universal" crampons. with 12-points and aggressive teeth, they can do anything that an 8 or 10 point will do, albeit more ungainly, but also rock and ice climb. They're tough, and so far unbreakable. I've debated getting a more flexible 10 point for light alpinism and a stiff vertical-front-point pair of ice climbing crampons, but these simply do it all. They are ideally suited to AD-D Mountaineering, because they shed glacial or soft snow very well, and can rock and ice climb on the front points. I highly recommend anything Grivel makes, they simply set the standard and everyone else just tries to keep up or reach towards more recreational consumers. The Anti-Bot plates on the Grivel crampons are rounded bubbles that flex to imperceptibly *pop* the snow right off with every step. No other crampon that I know of can do the same. All brands can keep the snow from between your boot, but only Grivels shed it below too. Consider your type of climbing/hiking carefully, and ask people in the know, but these are great :)
Date published: 2010-08-20
Rated 5 out of 5 by from Grivel makes the best gear for ice These are the classic Grivel Crampons for general mountaineering but can also handle some steep sections. They have been around for a long time now with very little change to the design, because they work well, they did right from the beginning. Mine are an older pair but I was checking out a friends & now they are a bit more aggressive. This would be better for mixed ground, these crampons really bite & they stay sharp, totally classic design!
Date published: 2015-01-23
Rated 5 out of 5 by from fantastic performed up to its name on Elbrus, paired with Scarpa boots.. good combination. already checked with Invernos - good fit as well. Good looking, world classic. Recommended.
Date published: 2010-03-22
Rated 5 out of 5 by from great combination These are a great general purpose crampon, additionally is spare parts are available so that you can convert them to full-auto or strap on when you buy new boots. They come with Anti-bots with an accordion piece for the bar so the risk of balling is reduced.
Date published: 2013-04-08
Rated 4 out of 5 by from Great All-Around Crampon My first pair of crampons were Petzl Irvis Flexlocks - while I still have these, they stay on the shelf unless someone needs to borrow them. The G-12s are awesome. They fit my La Sportiva Nepal Cube GTX 34.5s perfectly. I've done a lot in these: lower angle winter 14er routes, volcanic climbs like Pico de Orizaba, higher angle couloirs like Dragon's Tail in RMNP that require some mixed climbing (up to MI3), ice climbing (up to WI4) in Ouray, and they'll be with me on Rainier this summer. They're strong, stable, and are still sharp after 2 seasons (about 50 days of use). They don't shear in soft snow, they penetrate hard ice, and will hold pretty tiny pockets or ledges on rock (though if mixed or sustained ice are your main goal, I'd probably go with monos). I rated these a 4 out of 5, but keep in mind that I never give 5s unless a product is absolutely perfect. Like every strapped crampon I've ever seen, there is some slip in the strap after a long day of stress, but not to the extent that they become unstable or loose. Just pause, re-tighten, and you're good to go. I tend to clean my crampons after every trip if there's any dirt on them, otherwise I just dry them off - even still, as the black coating wears off, the spikes and grommets start to rust. Lastly, the anti-balling accordions work just fine for snow-covered routes, but get into mixed climbs or rock-strewn trails and they get shredded. I've had a couple days where wet snow builds up like a platform shoe and diminishes all traction every few steps on the descent. Again, these issues are common across almost every crampon I've every crampon I've tried or seen.
Date published: 2017-04-20
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Questions & Answers

Are these crampons compatible with Scarpa Phantom 6000 boots? If so, which system would you recommend the most? The cramp-o-matic or the new-matic? Thank you.

Asked by: cmortegab1
These crampons are compatible with the Scarpa Phantom 6000 boots. Which crampon you choose will depend upon the conditions you plan to use them in. However, the Grivel G20 Cramp-O-Matic Crampon is the easiest to put on and will be the most secure.
Answered by: REIservice
Date published: 2017-09-26

Are these compatible with Nepal Evo GTX boots

Asked by: Rafi
​These crampons are compatible with the La Sportiva Nepal EVO GTX Mountaineering Boots.
Answered by: REIservice
Date published: 2017-08-12

Will a regular Merrill boot work with these?  

Asked by: ganas5
The G-12 New-Matic Crampons require a stiff boot with a heel groove or welt to hold the rear heel lever. Non-mountaineering boots typically do not have this feature. To read more about how to choose crampons, click below:
Answered by: REIservice
Date published: 2017-03-28

What kind of boots do you recommend using for these crampons?

Asked by: ajf1126
The G-12 crampons are a hybrid crampon. Boots with a heel welt at the rear of the boot will fit. The Scarpa Charmoz Pro for example will be a great choice. On the specs tab of all mountaineering boots on you will find crampon compatibility listed.
Answered by: REIservice
Date published: 2015-09-20

Are these compatible with Salomon Quest 4D GTX?

Asked by: Victor
​These crampons are not compatible with the Salomon Quest 4D II GTX hiking boots. We recommend a strap-on style crampon for those boots.
Answered by: REIservice
Date published: 2017-08-28

Will these work with a snowboard boot? I have size 11 Travis Rice DG boots. My guide in Chamonix recommends the Grivel G-10 as one of the best (and I believe one of the few) crampons that can accommodate snowboard boots. Anyone have experience here?  

Asked by: TREAD
The Grivel G-12 New-Matic Crampons will not work with a snowboard boot. You will need a full-strap crampon to work with a snowboard boot, and the only way to ensure a proper fit is to try them on.
Answered by: REIservice
Date published: 2017-01-16
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