What if there was a dropper post, that actually 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 is still installed in your bike?
BikeYoke presents its new REVIVE dropper post, including one of the most brilliant features in dropper post design in many years. More than 10 years of experience in dropper post 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 it has improved on current designs, but because the designers were thinking outside of the box and created a new concept, that is completely different from everything before.
To understand the benefits over other posts, you have to know about the problems of many current designs first:
Many of the popular current seatpost 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 feeling like suspension. 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 becoming springy. This happens to a lot of posts in the market already and is the main issue of why posts need to be serviced.
That´s why BikeYoke´s “REVIVE” features a NON-IFP design, because their designers think it is too difficult - if not impossible - to make a really reliable design using an IFP. REVIVE only requires 2 dynamic seals in the hydraulic circuit (RS Reverb and KS LEV and Fox transfer use 4 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 has been 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 dropper post on the market.
The most important and ground-breaking feature of Revive is its “REVIVE-VALVE”.
Even REVIVE can get air somewhere where it does not belong. This can happen for example, when you actuate your seatpost a few times while its upside down.
And here is where the patented RESET VALVE comes into play:
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 is done just within a few seconds and only by the turn of a 4mm Allen key, without even having to remove your post from your bike.
So, now one might already understand that:
- No external air will want to go inside the post´s hydraulic circuit, since it is charged with higher pressure, than its surroundings.
- 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
- The hydraulic system can be reset to “new” via the unique “REVIVE-valving”
This means the hydraulic circuit is a very stable closed system and basically maintenance free. Still, there are parts that will need to be serviced sooner or later, so when designing REVIVE a lot of attention was put towards 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.
|Travel:||125mm, 160mm, 185mm|
|Total Length:||397mm, 467mm, 484mm|
|Cable/Housing Length:||1700mm / 1500mm|
Specs subject to change without notice. Please check with manufacturer for the most up-to-date information.
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