PRESS RELEASEBikeYoke REVIVE Details• Self-serviceable dropper post with reset function
• Non-IFP design.
• 125mm and 160mm options
• 30.9mm and 31.6mm diameters
• 'Triggy' One-By remote or regular push button
• Weight: 470g (125mm x 30.9mm), Triggy remote 25g
• Available January 2017
•
www.bikeyoke.comPre-order deal:
• 125mm - 293€
• 160mm - 310€
• Free shipping worldwide
• Titanium saddle clamp bolts (original: stainless steel)
• Free I-Spec B or I-Spec II adapter
What if there was a dropper post that solves and not just improves reliability issues, saves cost and time, and does not let you worry about time at service centers anymore? Or how about 'bleeding' your seat post within a few seconds while it's still installed in your bike?
BikeYoke presents its new REVIVE dropper post featuring one of the most brilliant design features in dropper design in many years. Revive will start with 125mm and 160mm options, infinitely adjustable travel and in 30.9 and 31.6mm diameters. More than ten years of experience in dropper design went into the Revive, and the development has finally paid off. Of course, just as many other companies BikeYoke would say, that Revive is reliable, strong and smooth…
And yes, Revive is all of that, but not because we tried to improve current designs, but because we were thinking outside of the box and created a new concept, that is different from everything before.
Status QuoTo understand the benefits over other posts, you have to know about the problems of many current designs first. Many of the traditional current designs are based on a hydraulic lockout-system that relies on a perfectly sealing IFP (Internal Floating Piston), separating oil from air to prevent the seatpost from getting that suspension feeling. There are a lot of difficulties to overcome when using an IFP because an IFP has to maintain 100% sealing function. If air can go to the oil side, your post will start becoming springy. This happens to a lot of posts on the market already and is the main issue why they need servicing. Just to mention a few of the issues an IFP design comes with:
• An IFP design requires a perfect finished surface of ID and OD, of both, inner and outer tubes in the hydraulic circuit. There is a high defective rate during production and is also difficult to keep the quality stable. This means those tubes are very expensive to produce.
• IFP designs require perfect concentricity of those tubes to ensure the IFP can move smoothly.
• An IFP is a dynamic seal with high preload/squeeze. This causes a 'stick-slick' effect on many posts, which you can feel, when your seatpost gets stuck and you need to break it loose manually because only pushing the remote won't make it start moving.
• IFP's are usually kept as short as possible to save on build height. But this means they can tilt inside the tube more easily and cause overly extensive wear and/or leakage. Long tubes and long travel will make it worse because the IFP has to follow not a straight line inside the tube, but a bent tube, since longer seatposts will obviously have more flex.
• An IFP usually requires a complex or difficult bleeding procedure, where the IFP has to be set to a certain position. Too much or too little oil also can cause malfunction of the seatpost.
REVIVE DesignThis is why BikeYoke's Revive features a non-IFP design because we think it is too difficult – if not impossible – to make a reliable design using an IFP.
The Revive only requires two dynamic seals in the hydraulic circuit (RS Reverb, KS LEV and Fox Transfer use four dynamic seals) with those two seals being the ones that are known to cause the least problems in sealing application: The inner shaft sealing and the piston sealing for the lockout mechanism. The highly critical IFP is removed and with it the need of perfect concentricity and finish of the sealing surfaces of the tubes. The lack of an IFP also results in the smoothest action of any hydraulic drop-post on the market.
REVIVE VALVE – The Reset-FeatureEven Revive can get air somewhere where it does not belong. This can happen for example, when you actuate your seatpost for a few times, while its upside down. And here is where the patented Revive Reset Valve comes into play: The Revive valve is located underneath the seatpost-head (same as a Reverb and KS LEV for example) and serves as regular air-valve for pumping up the post. However, pushing the Revive valve opens ports between chambers and activates the Revive-function:
Insert a 4mm Hex Key into the Revive hex port, turn it and push down the post by hand. This will automatically reset your hydraulic circuit to “new.” Whenever. Wherever. This can be done within a few seconds and only by the turn of a 4mm Allen key, without even having to remove your dropper post from your bike.
We made a video to show how simple this is:
Here is the REVIVE-feature in real-life action:
One Piece LowerNext to creating a completely resettable hydraulic system, Revive also features a one piece lower tube, whereas many posts have the upper bushing (which experiences the biggest load) installed on a separate top cap, which is threaded on top of the lower tube. Installing the upper bushing directly into the lower tube does not only increase the structural strength of the lower assembly but also provides better load displacement. Perfect concentricity with the lower tube and it's keyways that house 6x pins to eliminate rotational play, is also an attribute that comes in hand with a one piece lower tube. Due to the extra wall thickness at the collar area, Revive is also less prone to be affected by high seat-clamp squeeze.
ServiceabilitySo, now one might already understand that:
1. No air will want to go inside the post's hydraulic circuit since it's charged with higher pressure than its surroundings.
2. No oil will go out (or at least very very little oil over the course of a long time) because of very stable sealing - external sealing has never been a real problem of current post design
3. The hydraulic system can be reset to “new” via the unique “Revive-valving.”
This makes the hydraulic circuit into a stable closed system and basically maintenance free. Still, there are parts that need to servicing sooner or later and when designing Revive we put a lot of attention to maximum user-friendly serviceability: Bushings and keyway pins will wear over time. Usually, the pins wear first, and you would want to replace them to reset your rotational play. Exchanging the pins and the lower bushing is simple and does not require any opening of the hydraulic system and can be done within less than 5 minutes. You can watch how to do a
full service here.
MENTIONS: @Sacki
This is just like ten guys who worked at Crank Brothers for a year each, right?
Secondly, I readily admit your English is much better than my German language skills. However it will benefit you *greatly* to have an American or Canadian English speaker proofread your press releases before publication.
As long as the service intervals don't increase any more and the basic functions are working I'll ride the hell out of that thing though.
I haven't looked deep into the issue, but I washed my bike yesterday followed by lubing the dropper stanchion. I found some water into the post. Probably entering from the top of the post if you run it in a stealth set-up.
So, word of caution is to keep an eye on it so water don't enter through the head.
Other than that, both my Giant Switch posts have been reliable. I'm getting the new Wolftooth lever though.
Getting two of functional (160mm!!), reliable and reasonably priced would be a significant step in the right direction!
Dropper post bouncing? With the twist of this magic dial and a push on the saddle, you can fix that! Just fork over this amount of dough and suddenly your service intervals are more than halved!
I saw Giant switch SL's at a good price on some web sites, I'm gonna try one as a back up and see if they are as reliable as some say.
I have a 4 year old reverb that works perfect and has never been serviced. Wife has a 3 year old KS Lev that's the same. Did we find unicorns?
Seriously though, it probably has a lot to do with the conditions you ride in, and how rough you are on the post.
I rebuild my post every few months, and can nearly do it with my eyes closed now. The same seal (bottom seal on the internal shaft) fails pretty regularly.
Once you learn how to rebuild it though, it's cheap to get a "new" post from the buy+sell.
Ive had a Giant dropper since 2012, only replaced it last year due to the seat rail clamp failing. Went straight to the new 2015 Giant contact dropper and its flawless!
We have been riding and testing the post for a long time now, and you may believe me, that what you are explaining is not the case.
You need to reset your post for example, when you have the post upside down and push the remote.
Just this past week, we have been riding our posts in Italy with a continuous 1500m descent from about 2100 to 600m above sea level. Several times a day for 4 days straigh. Never had to reset it even once. And believe me: Those trails are fast and rough. ;-)
When you open the valve, the pressure equalizes on both sides, naturally. When you close the valve, the pressures stay at where they are.
How would the air pressure ever different on the other side of the valve? Oil can not be cut off from pressure by an open valve.
Believe me or not. It works perfectly! ;-)
The pressure is still in the center chamber, even after the valve is closed.
It does not matter, if it is disconnected from the air side, or not.
If that what you are saying was fact, then you´d be able to let pressure simply disappear.
Imagine, both chambers have air and oil inside. Then when the valve opens, the pressure will be same in both chambers, right? And when you close the valve, the air pressure in the center chamber will still remain. That is clear, right?
And now go away from the idea, that a pressurized air volume has to be involved, to set oil under pressure.
Another example: Go diving in 100 meters depth. Take a cup with a lid with you. Fill the cup with water and close the lid! Does the pressure inside the cup suddenly disappear, just because you disconnect the water inside the cup from its surroundings? No, right?
It does not matter where the pressure comes from and it can not simply disappear, because a valve closes.
Would love to rock some Gsport hubs on my mtb
Been running Gsport products on the bmx since 94
Head " Wiggles" I don't give a crap
No effect on riding but killed the company .
Erm no!!I set and forget.seat down at the start of the downs and seat up at the beginning of the climb!why would I need to put my seat up half down a downhill track.now if you do that bohns1 your the weirdo
Dude if u want a lever at your seatpost, rock an old Joplin then and be happy.. But the sport has moved on... Get over it
But please consider our extremely low stack height!
This means, that for the same saddle height, our post does not go as deep into the seattube, as other posts with the same overall length. Also the bottom part, where the cable attaches is rotateable to get some extra clearence, in case the is a pivto or somethin This can also help in some cases.
You can check out detailed drawings and measurements here in our tech section or directly via this link:
www.dropbox.com/s/4uj60aawpzkr167/REVIVE%20125.JPG?dl=0
www.dropbox.com/s/doxo24cuqwt7z97/REVIVE%20160.JPG?dl=0
For us as a (still) small company, we can not offer too many variations in the beginning, because tubes have a very high MOQ from our suppliers.
This means, we have to concentrate on the major diameters first, which are 30.9 and 31.6.
Anyway, if (for example) "only" all 2017 Specialized Enduro owners would like to swap their 125mm post for a 160mm REVIVE and we get enough confirmed interests and then finally "safe" orders, then we could do a 34.9 version basically right away.
Of course oil level will decrease (although very very slowly), because seals are never 100% sealing. REVIVE can work with an oild leverl of more than +/- 5ml of factory setting, so even if 5ml of oil get lost due to regular use within years, then REVIVe will still wirk perfectly. And losing 5ml due to "seating seals" takes alo of time.
However, if anyone wants to do a oil chamber service, this is basically how you do:
1. Release the air pressure
2. Remove the stanchion unit (as you can see in the service video)
3. Unscrew the bottom endcap of the stanchion unit and remove it with the shaft and piston unit.
4. Drain the "old" oil and clean the stanchion unit
4. Fill in about 40ml of new oil
5. Insert the shaft unit and reinstall the botton endcap
6. Put everthing back together as seen in the service video and reinflate.
7. REVIVE your seatpost
Done.
Don´t forget it´s an open bath design, and super simple to deal with. No messing with super accurate IFP psoitioning or precharging or charging, or whatever. Just put in new oil in the right amount and put back together.
$330USD preorder. Germany.
If so much complexity is reduced, and manufacturing tolerances opened up, how come those savings don't show up in the MSRP?
We are still a small company, producing not in quantities of hundreds of thousands, like the other droppers mentioned here.
Other posts, that are referenced here in some comments cost less in production than REVIVE, just because they are produced in quantities that go beyond hundreds of thousands, while we produce maybe 1% of that. Still their MSRP is way over 400USD and it goes up to 470 USD.
Yet, our MSRP is way lower than any other "high-end" post on the market.
Also our price includes free shipping world-wide.
And please do not forget, that your post has some pretty nice features that other posts do not have.
So please, may you explain to me again, what exactly you want to say?
This is a press release, that was orginally written by me and adapted and modified by PB´s editors, just as any other press release on PB and in an other media. It is declared as PRESS RELEASE, just as any other press release.
Maybe I don´t make it sound like something official, as many other compaines do, when they write their press releases but I am not one of those guys, that wants to make something sound like it was from someone else, if it was not.I don´t mind people being able to immediately see, that it was written from the company itself. We have nothing to hide, and we are honest persons, that you choose to trust or not. It´s up to you.
If I have somethig to say, I am going to say it. If someone has to say somethign to me, I am happy to listen and reply.
I don´t mind being criticized, I appreciate any feedback, if it is constructive.
But please don´t complain about a press release, just because you can directly see, that it is a press release and not a press release in some fake disguise.