Everflow Suspension “link” and “tank”

Intriguing that “link” device.
Why?
I’m a light rider on a 180 38 Zeb. No tokens. It ramps up A LOT. I get nowhere near full travel. I know some should be in reserve for Rampage like hits, but, in my case, Max is prob 130 and that’s with 15 psi less than RS recommendation for my weight.

Apparently air in your fork lowers contributes massively to suspension ramp up. Acts as a second air spring which explains why you have to bounce to get full travel even with the air out and valve core removed.
(The phenomenon was confirmed by Franco’s testing at EXT – finding something like 150kg reistance at bottom out!)

I’ve been testing the TruTune device with no measurable success despite the stellar reviews – so started looking for info and came across this suggestion
this

It links the air in the lowers – and since there’s more air volume in the damper side, it reduces the lowers’ contribution to ramp up.
Yeah forks such as ZEB have bleed valves but those aren’t a solution as they only bleed air at rest. Not at full compression.
I’ve never heard any air come out of mine.
You COULD compress to say 50% and bleed but that means a partial vacuum in the lowers which may suck in muck.
I heard Mark Weir experimented with something similar to bridge the legs.
Wonder why manufacturers don’t do it using the fork bridge.

Everflow are in Italy and there seems to no UK dealer. I’m surprised that forward thinkers such as J-Tech haven’t taken them on, so maybe that says something.

So – anyone tried the Everflow link or maybe the tank?

More here.
https://m.facebook.com/everflow.suspension/

Thanks.

Hi, I have used the Everflow Tank/Sealhead(although an earlier version with only one configuration) on  a 2020 Charger 2.1 Pike Ultimate and I thought it was excellent for the money. I never liked either the B1(too soft and no mid stroke) and the C1 airspring was just an awful, harsh bag of shit. The Tank just seem to get everything balanced within the fork.

https://www.everflow.it/webshop/tank-and-co./tank-v4-lyrik-pike-2016-22/

And now other riders in our group ride them on Pikes and Lyriks.

I have no experience of the air linking kit, but the tank and seal head I felt gave a more linear, usable and more balanced fork.

Honestly I’m amazed more people don’t talk about these, they are the best bang for buck upgrade ..and fix much of what Rockshox made a dog’s breakfast of..

Please speak to Andrea directly at Everflow if you want any information he’s a top guy, and you’ll have no problems ordering direct.

i saw these recently, where does the tank sit in the fork?

the link is also interesting. it would be interesting to see figures that give an idea of the difference it makes.

i’ve often wondered how much better suspension forks could be if lower legs could vent. obvious challenge would be keeping things clean

The Tank replaces the footnut on the airshaft

I had the same issue on my Rev. Too much progression at the end. Tried a luftkappe which helped the poor initial sensitivity but made the progression worse as it takes up the same space as a token.

I bought a Zerodue from Everflow which was a complete C1 airshaft with a modified piston and the tank fitted. It completely transformed the fork. I had settled at 67 psi on the RS spring and ended up with 74psi with the Everflow spring/ tank.

If I’d have ridden the standard airspring at 74psi,id have been kicked off the bike (it actually happened, more than once…)

Larger negative spring means better initial sensitivity which in turn means you can run more pressure for better mid stroke support.

It does make a big difference. As much of a difference as swapping the crappy MoCo damper for something which actually worked in terms of feel.

Still, the ultimate solution for me was to buy a Manitou Mezzer which worked 100x better out of the box and made me kick myself for wasting so much time and money faffing with RS.

Much cheaper to buy the Tank though and see how you get on. It’s not going to make the fork less progressive though. If anything, using a higher pressure is going to make it more progressive. BUT, you’ll have better midstroke Support so it won’t be such an aggressive ramp up. Currently you’ve got a soft airspring that suddenly kicks you in the face as you blow through the travel. It should be a step in the right direction to fixing that. Even if it doesn’t reduce the progression, you’ll have a fork that (hopefully) feels better so who cares whether you’re using all the travel or not if its working nicely.

I can’t really comment on the Link device. It’s literally a few pneumatic fittings and some tubing though so fairly easy to replicate.

What settings are you using on the dampervby the way? Is there any scope to open the compression up?

The link is just a lovely, simple idea. I don’t want it, because it’s ugly but I like it very much. I do wonder if the pipe size might be a restriction but even then it almost can’t not work, at least a bit.

The tank etc is a bit depressing really, just seems like yet another page in the saga of “Rockshox can’t do negative springs since single air”. I mean, at one point they literally looked at the Luftkappe, copied it, fluffed the implementation then slowly reverted to type. You could upgrade a 2010 Revelation yourself by reducing the size of the bottom-out spacer with a knife. So many fixes for the same bloody thing. All credit to the people fixing it but damn it rockshox.

Bens.
Damping fully open. I should probably get J/Tech to open up the shimstack a bit.
I’ll consider the tank and at €25 I think I should try the link. (Without the ugly pressure relief valve). I’m waiting fir them to return fir their Summer break.

Thanks for the feedback everyone. Forks quite new so maybe I’ll hold off on internal kids like tank. Is it hard to fit? Airspiring internals changed? Their website is pretty opaque on detail.

Weird the Trutune seemed ineffective. I see Everyine sell it and recommend. Maybe with the link it’ll fly.

Thx again.

The Tank replaces the footnut on the airshaft

i’m not too familiar with RS forks, does the tank sit outside the lowers? i’m guessing it’s hollow (like a tank…), and increases the negative spring like the vorsprung secus. is this the case?

Tank goes inside the fork. It replaces the red foot nut on the bottom of the air shaft and increases the negative air volume buy using the internal volume of the airshaft and adding to it with the Tank.

Similar idea to the Secus in that it increases negative volume. The concept is better than say, luftkappe because it doesn’t affect the positive air volume which affects the progression of the air spring.

i’ve often wondered how much better suspension forks could be if lower legs could vent.

Ah the early 1990’s gave us Pace RC35 “Atmosphere Balanaced” forks. Aka a small hole drilled in the fork legs…

Surely the logical thing would be to design a small vessel that could be attached to the fork leg, or perhaps the inside of the steerer tube, you could then expand/reduce the compensatory volume as muc as one desired?

thanks for the info.

Ah the early 1990’s gave us Pace RC35 “Atmosphere Balanaced” forks. Aka a small hole drilled in the fork legs…

i had some of those. it was hard to tell if the AB worked given that the rest of the action was so primitive.

Surely the logical thing would be to design a small vessel that could be attached to the fork leg, or perhaps the inside of the steerer tube,

the secus is a vessel that attached to the bottom of fork and fox have just filed a patent for hollow fork crowns that can be integrated into the negative spring.

it all seems like a lot of complication to replace a coil negative spring, though (or a coil positive spring, come to that)

edit: it is interesting to see what the independent tuners come up with, though.

Surely the logical thing would be to design a small vessel that could be attached to the fork leg

Like most things when it comes to suspension the MX boys have already been there.

I think I’ve got some Festo fittings and pipe in the garage.
Might give the link thing a go see if it does owt.

it all seems like a lot of complication to replace a coil negative spring, though (or a coil positive spring, come to that)

Maybe, depends on the performance returns.

The Tank and the Secus both augment the negative air spring, but the link attempts to reduce inherent ramp from the lowers – which is not the same as the negative spring.

The fttings for the link look to be standard industrial compressed air push fits. If you have access to a supplier and the parts, I doubt you could assemble it for much less.

Might give the link thing a go see if it does owt.

I’d be interested to hear how that goes.

The fttings for the link look to be standard industrial compressed air push fits.

Yep they’re just Festo fittings.

singlespeedstu, care to link us to the bits to make a “link” please? I corresponded with the maker, he says it will maybe give 10mm extra travel – also rates the Trutune (which I’m testing and cant feel)

The Tank and the Secus both augment the negative air spring, but the link attempts to reduce inherent ramp from the lowers
– which is not the same as the negative spring.

for sure. i was referring to negative spring. the link is lovely and simple.

Returning to this – I got a replacement TruTune and I think it does work now, strange. More travel is used so that’s what I was hoping for.
Chris Porter at Mojo Rising / Geonetron Bikes also serviced my lowers switching to EXT lube in the legs. Really slippery stuff that.

I’m also regularly using this little lube bottle https://www.mojo.co.uk/ev68s-inc-plastic-pick-tool-1716-p.asp
with a thin spout from Mojo / EXT to inject lube into the fork seals
– after cleaning them using this which always gets out some crap –

https://www.demon-tweeks.com/bikeservice-5pcs-fork-seal-cleaner-bic5804210/?istCompanyId=a2904180-3a7d-4e56-b876-cf81c9512180&istFeedId=8414c2a5-1705-4370-95b3-d68f3de84c4e&istItemId=iwaqxrirw&istBid=t&srsltid=AfmBOoosdf-NVsEbGzKl6KE_Ken1U5SemoAG-tyyuBaYAqtITLMpo5D2DAs

Really useful and lasts if used gently.

It all helps the fork to feel far nicer. Next step the Everflow “link”

What is the thread on the Zeb air relief fittings? I’ve probably got all the bits needed at work and if not I can get you part numbers.

Doomaniac I’ll try find out thanks.
They look like this

I’ll pull one and try measure up.

Oops wrong link
Rockshox Pressure Relief Valve Pike/Lyrik/Zeb 2023+

I decided to order the Everflow link. Neat kit. Will feed back when tested. It’s a sound theory.

Testing. it’s very neat with nice bolts with etched heads. Tidy.
Going well so far. On a very wet ride it seemed to increase travel a bit more than 10mm. Nice. I’ll write up more after more testing.

I suppose the other thing to do is put a carbonair insert in. That should help with ramp too.

Late, this, but good link Mudfish, got Nightclubbing from the same session playing now.