Specialized Command IRCC dropper post - Dirt

Mountain Biking Magazine



Specialized Command IRCC dropper post

A slick and reliable way to keep your flow...

The Command post from Specialized has been hammered hard over the last few years here at Dirt has impressed us. The latest IIRC version has moved things on a notch further.

The dropper seatpost is now seen as an essential component on a trail or enduro bike and has become standard kit on our favourite bikes in these categories once you tip over the £2K price point. We’ve been using dropper posts for six years or more now and have found them indispensable for keeping riding flow on undulating terrain as well as dropping into the steep stuff. In the seven years since we featured the Gravity dropper post in the 2009 Dirt 100, these products have been given plenty of product developers attention and now offer more travel, a smoother adjustable action and better sealing from the filth. Remote levers are now slicker, with better ergonomics and work well with the modern day single ring transmissions that have now come of time.

However well a dropper functions, reliability is key, as a post that is stuck down or up is going to spoil a ride (or a roadtrip) and have you heading to a bike shop for repair. The Specialized Command post has not missed a beat, regardless of the stick we’ve dished out. Mud, grit and water from the real wheel has yet to trouble the action of the post and along with an excellent under-the-bar SRL lever has resulted in design that has risen to the top of our list.


There’s plenty of variations with dropper posts, and with the RockShox Reverb now being offered in 150mm and 170mm drops, and in a variety of lengths, time marches on. The Command post (as yet) has a maximum of 125mm stroke and only come in one length and a 30.9 diameter, so can instantly be a miss for some riders and understandably so. The Stumpjumper and Enduro that we’ve been running long-term have these posts as standard and with the frame sizes we’ve been running have been spot on in terms of travel. But riders understandably want more, and it’s here where a 150mm plus Command post would be a useful addition to choose from.

The previous generation Command post was a cable operated design with three positions within the stroke to choose from. In action it was either fully up, a short drop for riding technical singletrack or fully down for descending, similar to the Fox DOSS post. The smooth infinite adjustment that the Reverb, Thomson and KS Lev post offer has set a standard which is seen to be the way to go and in comparison the original Command post seemed a touch clunky and agricultural – but it did the job reliably. And so to move things forward Specialized set to work and developed the ‘Cruiser Control’ tech which they’ve added to this post. You still get the first drop to the ‘trail’ position but then adjust through a subtly ‘indexed’ section letting you choose your position with a feel for where you are within the stroke of the post.Once you’re through this zone you drop to the lowest position for descending. It takes a few rides to master well but it has an action that we’ve grown to love.

The mechanical locking system that Specialized use on the Command post is their own patented technology not a design that is shared (as with a few brands out there) and uses a low pressure air spring to contaol the return action. This gets some criticism from some, as the return speed can be high, but again, with a release of the SRL lever as you rise up with the post together this can be worked with easily. The air spring is externally adjustable and a quick tweak of the pressure can slow the return speed. Sure, the return action of the Rockshox Reverb can be controlled easily with its hydraulic system and that adjustability may win some over (along with the smooth action).

The IRCC (Internally Routed Cruiser Control) Command post ships with the upgraded SRL (Single Ring Lever) which mirrors the look of a Sram shifter and is cable operated. A standard lever (that came with the original design Command post) is also supplied in the box for use if you are running a front shifter. Again, this is not as sealed from the weather as a hydraulic system but also not a problem to maintain either. No complications.

An usual feature is the layback design of the Alien saddle clamp/head. Many dropper posts are either in-line or with a small 5mm set-back. No problem for most, but if you are upgrading a bike’s post and want to keep the sizing as before (without messing with the reach) this may well be a benefit or change the fit either way. We’ve heard from other brands that a layback clamp can give undesired leverage and increase wear but this has no been a case with design from Specialized.


As mentioned, the reliability of this post has been faultless. Being in the firing line of all the crap from the trail, you are relying on good sealing, reliable internals and a quality control lever to keep things working sweetly in the long term. Many of the cheaper posts out there start well, but get sloppy and unpredictable during a long wet winter of abuse.

The action of the post, letting you intuitively drop to the first slot with an audible ‘click’ and then gradually slide a few notches lower when needed can take the indecision of an infinitely adjustable post can bring. You’re not hovering in the mid ground not knowing where you are within the post’s stroke. The graded section on the Command post lets you know where you are.

The SRL lever sits in the perfect position below the bar on the left hand side and works well with 1×10 and 1×11 transmissions. The ergonomic and shape of the lever is great, and very similar to the KS Southpaw lever and those available for the new RaceFace and Easton posts. It’s tucked nicely away from crash damage and has great ergonomics – always easy to locate, even when charging hard.

There are plenty of dropper post designs out on the market and the forums are full of stories of failures and unreliability. But for every rider that’s had an issue (or even multiple repeat problems), there are those posts that have never missed a beat.

If your bike is the (popular) 30.9 internal seatpost diameter, and you’re happy with a 125mm drop, then we feel that at £250 the Command IRCC seatpost is a winner. With plenty of well designed and developed products coming from Specialized ( such as tyres, grips and wheels) its no surprise that they’ve produced a great dropper, after all it’s standard spec on a whole range of their bikes not just an after-market product.


  • Patented mechanical locking system with the addition of Cruiser Control Technology.
  • Cruiser Control technology features added positions in the cruiser control range.
  • Bonded lightweight aluminium micro-adjustable “alien” style head.
  • Dual-keyway system eliminates saddle wiggle.
  • Energized triple-lip wiper prevents contamination.
  • Durable zero-gap, dual-lip x-ring internal seal ensures long-term durability.
  • 30.9mm seat post diameter only.

WEIGHT: 596g (with full cabling, SRL lever and all hardware)

PRICE: £250



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