Review: DSP Bighorn Adjustable Seatpost

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The clamping on both sides are independent. As mentioned, the clamps are massive which probably makes them strong.  Fitting to thinner racing type saddles would need a little patience, like the WTB Silverado I picked at random from my saddle bin. Not a big issue and once the rails are snapped in place, fore/ aft + tilt adjustments are super easy.

Once satisfied, just tighten both 4mm screws down good. For designs like this, when the screws are not quite tight, the saddle can be rotated almost a full 360 degrees!. This allows easy reach into the cable set screw and adjustment valve without having to dismantle everything. A big plus especially when on the trail.

This is a big plus since most clamps these days use a one-bolt system. Such systems are simple but they usually require a tremendous amount of torque to hold the seat angle in all situations. It’s not uncommon on other brands with one-bolt systems to pop during  technical situations and start tilting up.

Everything was ultra tight and it almost didn’t budge when I tried to push the saddle down after installing!!

So far everything looks good and sturdy. An adjustable post that looks to be able to take some abuse on the trail (remains to be tested for a period before I would stamp a pass on this). But all the strong beefy features make this by far the heaviest I have weighed. The piece here, a 30.9mm size comes in 25g more than the stated weight of 605gm. Nothing I will worry unduly over if everything works well though.

+1 for the details to the finishing. Quality machining.

One last thing I wondered is, whether color kits would be offered in the future. Not that the current color combo is unacceptable, but having things like color kits is always a good way to sway some that matches things  right down to the last spacer on their bikes.

Its Friday evening now, so trail testing is just a few hours away.

Trail Testing

Jan 7: Quick urban ride today as there is no time for the trails. The return on the post is fast even though it’s not broken in yet (as evidenced when lowering the post where it requires sitting down hard on it with my weight). The fast return speed is something I always wanted over my other hydraulic posts. On this aspect, only a mechanical dropper on another one of my bikes can match it so far. For those that prefer a little slower, this can probably be adjusted via the air pressure at the other end of the post.  No hiccups so far, works as it should.

Jan 8: Moved it up and down a couple of hundred times…mostly loose enough now for a very smooth action. Twisted saddle forcefully enough to test for any side to side play…none.

I was going test the Bighorn, then keep it for another bike build and reverted to another adjustable post in the meantime. But I’m liking the smooth operation of it, looks like it’s a stayer on the EG.

DSP Racing recommends 100 psi air pressure in the seat post chamber. But in our test post, they put in a bit more air.

June: At the same time I’ve gotten my hands on the one of the later batches spotting  a change to M5 bolts on the clamps. That pretty much solves the only thing that has been nagging at paranoid me, even though the first piece didn’t fail so far. Well M5 are M5, like all my favorite trusty stems using this size of bolt, they are definitely much surer when clamped and overall easier to work on during maintenance and change of saddles when needed.


It has worked well for us and has been reliable. Strengths are:

  • Affordable 
  • Robust build, specially the 2-bolt seat rail clamping system
  • Ability to use remote or local lever
  • Excellent packaging and availability on 27.2 mm post size

Weaknesses are:

  • Heavy 
  • Single chamber system so nothing is locking the post when in the down position
  • It’s a safe but dated design

In summary, it’s a good option for those ready to try an adjustable height post but not ready to break the bank.

Photo Thumbnails (click to enlarge)

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  • sandwich says:

    The website doesn’t say anything about 27.2. Sad.

  • bob says:

    I took a new Kind to Snowshoe last year, it failed on my all mountain bike (26), turning into a pogo stick the first day. Glad the seller gave me a refund. Tried another brand and decided it wasn’t for me. Maybe for you folks with monster mountain but there hasn’t been anything in N. C. I couldn’t overcome with riding skill and sliding off the back of the seat. My suggestion – try one before you buy one.

  • rodrigo fajardo says:

    I believe the adjustable height seat post should be stock for every MTB at some level. we are in 2012 and this thing needs to evolve. For some of us it is a must when in downhill zone or when a difficult zone requires dripping the seat or slowing speed instead.

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