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A mate has an external routed Reverb (A2) which is just starting to sag by a couple of mm - is there any quick fix we can do as we're off to the Alps in a week......?
Was a thread recently... if I remember right, compress seatpost, then invert the bike and extend post while inverted.
Yup, depressurise, remove saddle, remove top circlip and plunger, top up with fluid, replace and test. You'll need to re-bleed the actuation circuit afterwards
Note: this isn't the correct way, but I had one that was forever going saggy and just did this once every 6 months and it always worked ok. You'll need to experiment with exactly how much fluid you add - it's only a small bit, but obviously not filled to the top or the plunger doesn't go back in. With a bit of experimentation you can get it spot on with most of the air out.
Need to be sure that the pink bit is full of oil but that the black space under the green plunger is not, or it will not move!
Found this on Interwebs a while ago - works a treat on my stealth reverb:
try this home tip first.
1. Fully extend the post and turn the bike upside down - try to keep the post as vertical as you can.
2. Protect the Reverb button with your hand and push it simultaneously while pushing down the seat (note - do not push out the post when the bike is upside down, it will get worse!).
3. Turn the bike back on it´s wheels (with the saddle in the bottom) and let the post fully back.
4. Hopefully this will stiffen the post
The upside downy thing sounds like it should work (And is quick), the other method I have used successfully but wouldn't really describe it as quick, it just was worth a go as I didn't have the bleed tool.
I reckon the bushes wearing out allows a bit of movement which helps the air get past the seals on the IFP - I could be wrong - so a basic service might help it not get worse (mine was getting worse but stopped after a service/top up).
Have you checked it’s at 250psi...
i had one that was sagging a bit, had dropped to about 180. Pressurized correctly it was fine
*bookmarks*
I’ve been doing this recently as it’s dropping every month; while it does work as a quick fix I worry about long term issues.
is the sagging issue enough to warrant it going back to SRAM as a warranty issue or is this general wear and tear?
IMHO any of that upside down tomfoolery is just delaying the inevitable service. If it's still under warranty, send it back fo shiz.
Send it off to these folks. Got my externally routed Reverb back the other day for £39 after it had stuck down. They change the bushings and seals and that.
http://www.reboundsuspension.co.uk/