Prototype KS Telescoping Seatpost - Taipei Cycle Show 2011

Mar 20, 2011
by Mike Levy  
KS was showing off their prototype telescoping seatpost that is targeted to be the lightest dropping post on the market, not to mention it using a cable actuation point on the post's outer tube that will remain stationary when the saddle is dropped.
photo
The prototype post from KS looks to have a lot going for it, including a target weight of just 400 grams and a stationary cable entry point located on the front of the post's outer tube.

Kind Shock's lineup of telescoping seat posts have been a favorite of many riders for awhile now, proving over time that their hydraulic internals and one-way bearing system is up to the task. KS looks to build upon that success with a new, and currently unnamed, model that will not only be the lightest dropping post on the market, with a target weight of only 400 grams, but also address those pesky cable management issues that plague the majority of telescoping posts.

The most obvious feature of the new post is it's cable entry point, which is positioned at the post's collar on the outer tube. It is common for nearly all telescoping posts, save the Gravity Dropper and one or two others, to have the cable run all of the way to the post's head, which is no doubt simpler to manufacture and produce, but also creates a few issues. Anyone who's owned a dropping post is well aware that the surplus cable must go somewhere when the saddle is dropped, and a lot of time that place involves it buzzing on the rear tire when the bike goes through it's travel, or ugly cable routing to keep it in check. While some riders may not be a fan of the aesthetics, having the cable exit from the post's outer tube not only makes for cleaning routing, but the cable is also stationary - it won't change position when the saddle is lowered or raised. In order for the design to work, KS had to flip the post's cartridge from how it was orientated in their current designs. It also uses two cables to operate: the standard shift cable that runs from the remote to the post, and an internal cable that is attached to that via a coupler. Cable changes are still simple, only requiring you to remove the coupler between the two cables to perform the repair.

photo
The prototype post features a host of changes from the current version, with the most notable being a new front positioned cable entry point (bottom right) that makes for cleaner routing and more resistance against the elements. The post's head (top right) was CNC'd on this prototype, expect a forged version on the production models.


The other big plus to moving the cable actuation to this position is that it is far less likely to be fouled up by the elements. The current KS post does work quite well, but constant riding in bad conditions can cause the actuation arm to not move freely, not to mention that the cable stop on the post's head puts the housing in a perfect location to get filled with water or mud (see the smart solution for current KS post owners below). The prototype's routing looks to be virtually sealed against such contamination and is in a far better location to resist any chance of this happening.


KS prototype telescoping post details:

• 125mm of total drop (infinite adjustment)
• Cable actuation located on the front of the outer tube
• Internal changes mean lower air pressure for lighter actuation
• unique bond-less seat post head design
• Release date: March/April 2012
• Weight: 400 grams (target weight)
• Price: TBD (will retail for slightly more than current KS models)


photo
The prototype was actuated with this trick remote that sports a carbon trigger. The weight saved is no doubt minimal, but it does look nice.


Internally, the prototype sees it's cartridge flipped 180 degrees to better facilitate the new routing, but other internal changes mean that it requires less air pressure to return to full height, meaning less stiction on the air seals and even more reliability. Smaller riders should take note of the prototype post's much lighter actuation than previous models - no more seat bumps to get the post to drop. I tested these claims with just my hand and found it remarkably smooth and easy to lower. Hidden within the post's stanchion tube is a new tapered, bond-less head design that actually pulls the head into the tube as you tighten the saddle clamp bolts, making for a more secure joint between the two.


photo
Besides the prototype dropping post, KS was also showing off this neat little mud guard that can be fitted to their current remotely actuated models to keep the grime from fouling up the cable.


Check out the Kind Shock website to see their entire lineup.


The prototype KS post is so new that it doesn't even have a name yet but it looks to be on the right track. Lets hear what you think about the prototype dropper from KS - is it going to be on your short list?

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68 Comments
  • 15 2
 All these adjustable seat posts manufacturers state this and that but as far as I know they ALL swivel, move side to side after a short amount of time, even the new Rockshox Reverb. I'd love to buy one, once this problem has been sorted out & the price is more reasonable...
  • 2 1
 I think you would run in to the same problem the lefty has. Seals are tight, and the pressure is evenly distributed the best when circular. The flat spots on the left have no pressure from the seals on the stanchion, so its hard to keep oil from leaking and keep gunk out. Thats why the lefty still has the rubber stanchion cover that we haven't seen on regular forks since 1998.
  • 3 0
 I've two KS and they are stiff for all sides and work fine. In true they are so better than other brands adjustable seat posts.
  • 3 0
 The KS has barely any side to side slop at all, even after extended use. The very minimal play you can feel with your hand is completely unnoticeable once riding. They are however sometimes slow to return and occasionally need a jostle with your ass to get it moving. This is a warranty problem but also can be helped with 'Slickoleum' grease which has a super low coefficient of static friction. They have however had a bad production run lately and a lot of the newer posts have shown up with a mm or so of vertical play due to an air bubble in the cartridge..... also a warranty issue.
  • 2 0
 Absolutely -ZERO- side to side movement on the KS. I've had mine for 2 years in all kinds of sh*tty conditions with minimum (ahem no) servicing:-)
  • 2 0
 Personal preference I guess, but side to side slop doesn't bother me at all. And, I'm talking 1/4 at the nose of the saddle.
  • 1 1
 eh...i personally think their gimmickee. ive ridden bikes with telescoping seat posts and ALWAYS nut-tap myself. but other than the death of my future kids i STILL dont really like them, i see know problem with the old fashioned tube and clamp style. just my opinion though.....
  • 1 0
 yeah, but £150 for a seatpost, for their most basic model... no thankyou!
  • 6 0
 If you ride aggressive all-mountain these posts are incredible and worth every penny and the weight penalty too. Until you've ridden them multiple times and get used to what they bring to the ride you really can't understand. They are the future make no doubt about it.
  • 1 0
 don't get me wrong, i'd like one, but at the moment, being that i'm a student where every penny counts, i'm going to put my money where it counts - i shelled out to have my fork serviced so that it runs as well as it can, but i only spent £15 on a seatpost, because it does exactly what it says on the tin.
Like i say though, I would buy one if I could, it's all about prioritising though, and it would probably come near enough last on my list of upgrades.
  • 2 1
 this is cool....not
  • 1 0
 I cleared the Mega on an "old skool" seatpost and didn't adjust it once! I will stick with my TRUSTY and strong Thomson and then just use my legs to stand and pedal when others are raising their post up.

a great idea for those that want them.

and yeah, before anyone starts i do very long rides with a hell of a lot of climbing. if the hill is that bad i would simply stand up and adjust it - its not difficult, not enough to be able to justify the £££ involved.
  • 1 0
 this is the nicest i have seen though after re-viewing it. and i think the finish looks amazing!!! the competition should take note.
  • 5 0
 Why not make cable and hydraulic adjustable seat posts and standard ones too in a delta configuration in stead of the classic cylinder? This would take out the play in the adjustable ones and allow an always perfectly aligned standard seat post and seat. Do you have any thoughts on this idea?
  • 5 0
 I think - it's because the classic cylinder allows a power transfer from a crash to moving the seatpost sideways, otherwise the crash would damage your seats rails or anything else. Just like the brake levers - if you overthigten them, you can break them, if not - they just move up or down when you crash.
  • 1 0
 yeah but only the outer tube needs to be circular. you can do it the seat post clamp as tight as you want. inside the actual device, it would be fine to use a different shaped pipe, but the seals work much better on circular ones.
  • 1 0
 I think a delta configuration (or a triangle for the people that don't know what a delta is) wouldn't leave enough room on the inside for the mechanism. Now, a hex shape could show some promise. Seals would be more complicated, but undoubtedly there's a workaround for that.
  • 1 0
 Why not just make the inner post slightly oval (like the inside profile of a thomson post)? That would eliminate play but still alow pretty straight forward seals/internals and very good strength?
  • 1 0
 There isn't enough real estate left when a designer has to start with a standard seatpost diameter. The bushing takes up a few millimeters, which leaves a minimal diameter for the sliding inner segment. Typically, the upper segments of existing posts are barely 24 millimeters in diameter--their strength is already compromised. So, round delivers the most metal where it's needed. Oval or triangular shapes wouldn't stand up to a crash, because impacts in their minor axis would bend them too easily.
  • 1 0
 The RichardCunningham ... very well then. I understand you have more experience in product development than most of us here, so if you say round is best round is best. Suggestions on getting the play out then?
  • 2 0
 Tough one. The nose gear on most airplanes use an external scissor link (like Foes uses to stabilize the upper part of his swingarms). A preloaded plastic bushing in the keyed area might be the simple solution. The Cannondale Lefty uses strips of preloaded needle bearings on a square segment to eliminate lateral play, and the round tube which extends below the slider acts as a sealing surface. Nice, but patented. I agree, though, that adjustable seatpost makers need to try harder.
  • 1 0
 Surely it only needs to be a Gnatts chuff worth of ovalness though? Most of the strength in a post needs to be front back. Sideways forces from crashes are infrequent and not as strong. Other tubes on a frame are not round and no-one worries about crash impact forces to them? All Roadie seatposts aren't round!

Manufacturers: don't go the way of the Lefty - them needle bearings and shims are a nightmare to service and I've seen the ruddy things falling out half way round a ride!
  • 4 0
 This looks so much better, I have the KS 900i and although its real good, it does get gritty real quickly cos of where the cable pinch and actuation lever are located on top of the head.
  • 4 0
 I have a Gravity Dropper and it has changed the way i ride. That KS looks sweet. Not sure what the price tag on it will be but I'm sure it will be worth it.
  • 2 0
 It is true that you need to ride this to appreciate it. I love my KSi900R (WITH Layback!), the post performs flawlessly. I would never ride without one again, and using it becomes completely second nature.
KS' posts are almost half the price of the competitors, have no play, are light and durable.
I don't know how they do it, but I'm glad they do.
  • 2 0
 A couple more notes: While hydraulic actuation would be sweet, it's definitely overkill, especially with the newer post design above. Covered in dry mud my KS still worked great, and they spec it with a teflon coated cable. Hydraulic would also raise the COST and the WEIGHT and size, as you would need a tiny master cylinder.
27.2 would be great, but probably too weak. The stanction is already quite small, and in a wipeout with the post extended a crazy amount of pressure could be applied sideways against the post.
  • 2 0
 I live in a wet muddy place and the people I know who have them have nothing but problems and usually have a normal post in there anyway as the KS is in the shop. They all stopped working in the cold weather. I'm getting tired of testing on the customer. I'm gonna resist this one hard.
  • 1 0
 That's weird, mine has worked great (except for dirty cables and my over-tightening my seat post clamp) all winter and I have ridden in sub 30 degree weather, snow...sleet and it's been great, Sorry to hear that others are experiencing these issues.
  • 1 0
 Mr. Lever speaks truth. I haven't found a single brand to be reliable for a decent amount of time.
  • 1 0
 I was more happy about getting a KS seatpost then the bike in general! I have had mine for a year and still love it. If you dont see why you would need one, then you apparently dont hit downhills like you should. Its a difference between night and day with the seat dropped. I cant believe that would actually be a disagreement
  • 1 0
 NO LAYBACK !!!! Why do so few telescopic posts have layback?
With normal posts there are more layback offerings than inline. Layback is needed more.

As for weight if they really want to make it light they should look at I beam. Lighter and offers layback. Oh and 27.2mm please!!
  • 1 0
 I bought the 5 inch and it stopped working and also bought the 6" which stopped working 10 minutes after riding it. An extra inch doesnt mean anything when you cant keep it up...the guy Rick, who's the rep and warranties the product, sent the 5" back to me without fixing it (although he upgraded it to the newer cable lever housing) and I never got the 6" inch back before my Moab/Fruita trip as I explained I needed it for and him responding , you'll get it back before your trip. DO NOT BUY! I have paid over 600.00 and don't have either right now. He told me they had been having problems with the seals manufactured in Taiwan and that they now have better quality ones that are made in Japan..But the ones from Japan are not working thats if it was even fixed.
  • 1 0
 I had one of the original KS's that were imported and branded by Fezzari. I had several problems with the first ones. I sent it back and had it updated once and completely replaced the second. Top notch customer service. Mine has been working great after the initial setbacks. It can get stick down when extremely cold out. The lever actuator can bind up from grit. Maintenance required. The stanchion has develop scratches/gouges but does not seem to effect the operation. I have been wanting to buy a new one because I dont like the setback on the one I have now. I will likely pick this new one up when released.
  • 1 0
 Looks sick and the weight is effin light. 400grams. The only problem I see with it is if you have a taller rider and the seatpost has to be higher up then that cable actuator will be way higher and then it would seem to get in the way. I think they need to find a solution for the cable actuator.
  • 4 0
 I love my Gravity Dropper. I dont know how I ever lived without it.
  • 1 0
 I love KS i900. It does not rotate, does not play and works very well, The internal sealed and pressurized cartridge is the great idea. It has the same operation of office chairs.
  • 3 0
 As soon as that prototype is put into production.... I'm buying it!
  • 20 0
 It's shiny, therefore i like it.
  • 1 0
 Ha too true! And I usually laugh at bellends like that... doh!
  • 1 0
 surely it'd be best to have a banjo valve coming off the side of the seat post so the hose can be routed in any direction you want
  • 4 0
 It's cable actuated...
  • 1 0
 my bad!
  • 1 0
 That would be a good next step though. Go hydraulic, and then for ease of adjustment, and a closer fit to the post throw a banjo fitting on.
  • 1 0
 then we can listen to the dualing banjo song. everyones happy.
  • 1 0
 I think the gravity dropper i beam is around 400g offers layback and is available in 27.2mm
  • 1 0
 pretty cool, but there are so many of those things now its hard to decide which one to buy... if i had to buy one
  • 1 0
 Anyone notice that last pic, looks like the new 6" version of the post...I want to see more on that one please PB. Smile
  • 1 0
 If Brian Lopes uses it, it must be good..right!!
  • 2 2
 in my eyes stopping to put the saddle down works as a well earned rest after climbing the hill.
  • 8 0
 what about rolling changes in gradient.. short sprint climb into short techy descent... stopping every time to change your saddle will kill trail flow. I was skeptical.. then used one.. wouldn't have anything other than a remote seatpost now!
  • 6 0
 Come out to ride in Moab Utah and you will be wishing you had a height adjust seatpost the entire time. The trails are typically 100 feet of tech climbing followed by another 100 feet of tech downhill repeated over and over again. My KS got used atleast 50 times on one trail. You end up using it more than you think on every trail
  • 2 1
 hmmm. interesting. lets face it if someones gonna dissagree with you two then they're either tight arsed or old school. but for the places i ride, one of these aint needed. tup
  • 6 0
 agreed with jonny and bubba.. it's a total paradigm shift.. it's not about slogging up a 1hr climb than putting you seat down for the descent.. it's about adjusting your saddle height almost as often as you shift gears on up-and-down rolling techincal terrain so that you can always be attacking the trail... i ride dh and xc and i hate having to corner my xc bike on descents and rolling terrain with the saddle up a full height.. get that saddle out of the way so that you work the bike properly through the corners, hops, pumps, and tech sections... section after section without breaking flow (until my lungs/legs give out of course).. "yes" you can do all of that with your seat at full height... but certainly not as well... bottom line... makes my riding way more fun and couldn't ride without one anymore... but if all your rides are straight up, then straight down... little benefit for one of these
  • 1 0
 Sort of agree - certainly I have no real issues with a stop at the top of a climb. And in fact I usually ride with a buddy, so he has to stop at the top too. Having a trick seat height adjustment post would just mean I was showing off whilst he adjusts... But, the rolling gradient thing is probably more in line with why this concept is useful, but not really ever had an issue with having to drop the saddle mid track. Or rather, when I've had to get off the back fast as the track gets tricky, the last thing I'd be doing will be fecking with seat height, I'm already off the back and trying to manage the tech section. Having said all this, I ride a Heckler for the most part, and if I was doing mostly solo, I could be seriously tempted. And this is a nice example!
  • 2 0
 I think it really comes down to if you haven't tried it then you wouldn't fully grasp the benefits. I hesitated for a while but now that i have owned 3 I can honestly say I would never have another AM bike without one. You will use it way more than you expect gauranteed.
  • 1 0
 +1 @ climbingbubba, exactly!!! as w-e-w said, you end up using it as much as you shift gears. WHICH brings up the point, RaleighVoid made, there will always be some that like old school/simple/single speed type riders who wouldn't want more gadgetry on their bikes... to each his/her own. BUT don't knock it till your try it...
  • 1 0
 i hope there will be also version with some offset (20-30mm)
  • 1 0
 that fixed cable routing is a huge improvement over current designs...
  • 1 0
 Its about time more companies started having a fixed cable, the RASE seatpost has been doing this for a while and has more travel range, but not infinite adjustment and its a bit heavier.
  • 2 0
 And the Gravity Dropper has been doing it longer than that. Smile
  • 2 0
 I don't like new cable routing. I can not imagine how it will look like on my bike : www.pinkbike.com/photo/6228094 . About 20 cm above the top tube.
  • 1 0
 You can hold it together the brake hose under the top tube: www.pinkbike.com/photo/4441646
It will be imperceptible while riding.
  • 1 0
 I am 245lbs (ugh) ride a steel hard tail and beat the heck out of it- I have used the KS i900r for almost a year and half. It is flawless so far. I use it all the time, even when climbing some sketchy technical sections where having the seat out of the way is absolutely a must. this new design looks awesome. Will it have problems? Dont know- I hope not. But the non-lay back is perfect for me and I am very excited about it.
  • 2 0
 eder . your pic show old cable routing. It is ok. New is not ok , I have to bend cable by 60-80 degrees( 2 times , you bent once). It will be a lot of space between the cable and the frame. But may not be so bad.
  • 1 0
 Maybe turning the seatpost to back.
  • 1 0
 Funny how the writer of the article doesn't realize that most people won't be lucky enough to have the cable sitting right above the top tube like that. Most of us will have it sticking out part way up, several inches above the top tube which totally negates this part of the design as a "benefit". As the above posters stated, we'll have to run it backwards, or have a little curly cue cable bend to get it down to the top tube to be secured...
  • 1 0
 yeah valid point sting, but the benefit isn't totally negated... the cable entry and routing is fixed and will not go up-down-up-down everytime the saddle height is adjusted, so once you have the routing sorted, you can forget about it... having the cable move with the saddle can cause the cable to bow out creating a snag, or hang up somwhere creating drag on the post movement, or tire buzzes as the article mentions... at least that much is eliminated... maybe they can improve the angle and/or projection of the entry in the final model (or release this one first, then improve it for 2013.. more likely perhaps)
  • 1 0
 when will these be on sale to the public?







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