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Old 03-19-13, 06:11 AM   #1
Raging_Bulls
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Anyone recognize this rear shock?

I recently built a new bike around a full suspension frame that's been in storage since it was built in 2007 or 2008.
It came with a shock, but there are no markings or decals to indicate a type, or even a brand.

The shock is losing air at an alarming rate. I had put both chambers at 170psi just before the first test ride, and within minutes the rear chamber lost all pressure.
The front chamber seems to keep some air because it doesn't collapse and is capable of carrying my weight, but after 2-3 minutes of riding it feels all wobbly and mushy even on flat roads.
Because I didn't have a clue as to the correct settings, I had my pump with me and re-inflated the shock a few times. All to no avail though, it kept losing air. I assume that one of the seals is leaking and the shock will need an overhaul.

Before I take it to my LBS, I'd like to know what type of shock this is so they can order the right parts. I've Googled a bit for RockShox, DT Swiss and Fox shocks of that era, but didn't find anything that matches this one or even comes close to it.
It has dual air chambers and a rebound adjustment knob, but no lockout. Eye-to-eye, I'm measuring 168mm.





The rebound adjustment knob has a dual-sided arrow with "+" and "-" marks, and a "R" on it, but no further identifying marks.
Any pointers as to the brand or the type would be greatly appreciated.
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Old 03-19-13, 07:30 AM   #2
Ferrous Bueller
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I don't recognize it. But before you take it in to the shop, you could open it up to see if you can fix the problem yourself. For instance, Cane Creek air shocks are easily rebuilt, and sometimes only need a bit of grease to make them seal well again.
You could use this to give you a rough idea why and where it's leaking and the sort of things you or the shop would need to make a repair.
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Old 03-19-13, 10:37 AM   #3
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I don't recognize it. But before you take it in to the shop, you could open it up to see if you can fix the problem yourself.
This is bad advice that should NOT be followed! DO NOT open up a shock until you know what it is and have some servicing instructions for that unit! Not saying this one does but many shocks have an internal nitrogen charge and things could go seriously sideways in a hurry if you dismantle one improperly.

Let's figure out what it is and go from there. It appears to be a SID Dual Air but I don't think I'm quite right on that. Anyone?
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Old 03-19-13, 11:49 AM   #4
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The SID has both nipples pointing in the same direction. Mine has one pointing down and the other to the side.
Some Fox shocks have a similar top end, but when I compare the direction that the nipple is pointing, this one is a mirror image of Fox shocks.

I did consider DT Swiss, but they have a rounded edge in the middle, not a huge hexagonal nut.

Opening the shock seems easy enough, but I am indeed worried about stuff flying out of there at high speed and me not being able to assemble it again.
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Old 03-19-13, 12:24 PM   #5
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I thought DT Swiss too, but none that I looked at had wrench flats on the upper chamber (which does indicate user-serviceable but doesn't guarantee it for sure). Most DTs have the rebound adjust thumb wheel inline with the shock shaft under the eyelet too. Has me stumped; looked at RS, Fox, Cane Creek (even the old ADs), DT, BOS, Risse, Stratos, even RST. Looking at it again, it appears very KS-ish.
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Last edited by dminor; 03-19-13 at 12:39 PM.
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