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  • X4 features 4 cam lobes for excellent expansion range and holding power, yet it maintains a narrow width so it can fit where other cams won't, such as in old piton scars
  • Narrow head width is created by embedding the cam springs within the cam lobes
  • Stacked axle design of the smallest three sizes gives the cams more expansion range per size than any other small four-cam unit available
  • Largest three sizes use the tried-and-true Black Diamond double axle design that's found in the original Camalot
  • Six sizes of the X4 cover the same expansion range as eight sizes of comparable cam units, meaning you can carry fewer cams yet protect the same size cracks
  • Aluminum beads protect the woven cable from abrasion without compromising the flexibility of the stem, allowing the cam to hold strong in awkward horizontal placements
  • Trigger bar is hot forged to fit comfortably in your hand and make cam placement quick and easy
  • Lightweight, durable Dyneema slings help you identify the cam you want when you're grabbing one; Dyneema slings visually set the cams apart from others on your rack
  • Color-coded Oz and Neutrino carabiner Rackpacks are sold separately, offering a great way to rack the Black Diamond Camalot X4 cams for easy identification


Made in 6 sizes; see specifications listed below for size = range / strength / weight / color:

  • Size 0.1 = 8.4 - 13.8mm / 5kN / 51g / red
  • Size 0.2 = 9.9 - 16.5mm / 6kN / 54g / yellow
  • Size 0.3 = 12.4 - 21.2mm / 8kN / 75g / blue
  • Size 0.4 = 15.5 - 26.6mm / 10kN / 82g / gray
  • Size 0.5 = 19.8 - 33.7mm / 10kN / 91g / purple
  • Size 0.75 = 24 - 41.2mm / 10kN / 112g / green

View all Black Diamond Cams

REI membership


Best Use Rock Climbing
Expansion Range 8.4 - 41.2 millimeters
Strength 5 - 10 kilonewtons
Weight 51 - 112 grams
Rated 4 out of 5 by from IT'S SUPPOSED TO BE FLEXIBLE! Ultra-flexible stems are NOT a CON. Flexible stems mean that the cam will be less likely to walk in its placement, and that it will stay in a horizontal placement well when loaded or fallen on. Ever climbed on Aliens? The head on these things is about 25% more narrow than their C4 predecessors which is awesome. That is also NOT a CON. The only gripe I have about these is the "symmetrical swage" design. In an effort to make a more aesthetic piece, BD actually created a point for the cable to bend rather easily. The "cap" that covers the swage point causes the cable to bend slightly after they've been used a few times. It's NBD, but still. The shining pros of this cam are the head width, double and stacked axle design which gives them better range, and INCREASED FLEXIBILITY. The beaded stem is nice and is chiefly what makes them better than their closest competitor. The price point I'm not crazy about, but whatever. These are sweet cams to be sure, but I'm not quite ready to go out and pay that price to augment what I already have in that range from another brand. If you're looking to build a rack on the small end, these would be an excellent choice.
Date published: 2013-07-04
Rated 5 out of 5 by from Master Cam meet C4 A very cool piece of gear, that was previously missing from the BD lineup. It is as though a C4 and a master-cam had a baby. The only downfall is that the stem is so flexible that when reaching for a high placement the head flexes a bit and may not slide down into a placement from above as desired. But that is a tradeoff as the piece inspires great confidence in horizontals and non-desperate placements.
Date published: 2013-05-13
Rated 5 out of 5 by from Best small cams Great design. Best small cam for parallel cracks. X4's provide bomber placements, especially horizontally. The cable guards are already earning their keep.
Date published: 2016-01-09
Rated 5 out of 5 by from Can't go wrong I've been using the X4s for a year since they came onto the market. They're designed much better than the C3s, which I don't particularly like. They have better range than the C4s, are lighter, and have a more flexible stem. For the small sizes (<= 0.3), I would take these over any other cam any day. For the medium sizes, the C4s are a good alternative, but I would recommend both. Check the specs and decide for yourself.
Date published: 2014-04-29
Rated 4 out of 5 by from X4 Camalot Everybody is familiar with Black Diamond's superior expansion range in their C4s, so it's good to see that same benefit brought to the finger-sized X4s. More range equals less nervous fiddling during those in-between finger sized cracks and hard-to-read placments. The heads on the X4 are almost exactly one lobe narrower than the C4s. I've used the X4s on familiar climbs where some C4 placements were always a bit questionable--a lobe or 2 not quite biting into the rock because of wavy places in the crack. The narrower headwidth of the X4s eliminates this issue by allowing all 4 lobes to bite into only the most uniform features of lumpy cracks. The X4 is perfect for basalt fissures. My only issue with the X4 is that the stem is significantly more limp than any other cam I've used. When you pull the trigger, the head flops to the side, somewhat bending the entire unit. It's strange to place a floppy cam and can make some placements feel tricky, like you've got a garden hose in your hand when you want a pipe. I'm sure it'll just take some getting used to, and I could see how the softer stem could absorb some rope wiggle and prevent some walking. Still, for now, it's kind of weird.
Date published: 2013-06-21
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