99% of reverb sag issues are because the inner seal head has worked its way loose, allowing the arrowed o-ring to come out. Probably loosens quicker if the return speed is set fast since it bashes the top-up rubber stop in the seal head. Loctite on the sealhead threads and tightening the hell out of the seal head fixes the issue (well at least for a good while). To get good leverage though you have to put a seat on the seatpost clamp (which you then have to take off again to put air back in (if it's a stealth post)
It's a 19x2mm o-ring I think.
If yours sags and you're close to Newcastle, send it to me
Thanks for the info, guys. I've taken it back to my LBS. Apparently SRAM are legendary at fast turn arounds, and, they're likely to swap it for a 2017 model, so that's a bonus!
2016 Norco Sight 14 months old, Reverb failed, took in for warranty. Took about a week turnaround, just got a whole new one back. good shit, happy dayz.
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