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What do people think about them?
Dampers
No idea, never looked at them, sorry.
I've just bought a set of XRM100 forks with Single Shot. I can't tell you how they perform (yet!) from personal experience, however, I did as much research as I could beforehand, and there doesn't seem to be any issues with the design.
DT forks are still rare in this country compared to the likes of Fox and RS. However, I've been really pleased with my EXM150 forks (and conversely was very unhappy with my RS SIDs) so decided to fit DT on my other bike, to replace the SIDs. The DT forks are REALLY stiff/strong and I am impressed by overall finish/attention to detail.
The Single Shot damper is unique compared to many other forks in that the design is more akin to a rear shock damper ie oil chamber with an IFP (but pressurised by air and not Ni), so completely different to RS MoCo and Fox open bath and FIT dampers.
So there is meant to be some air in the damper side?
Yes, BUT sealed within the IFP chamber and NOT mixed in with the oil. If there is air mixed in with the oil, then the IFP seal failing would likely be the cause.
In simple terms (once the top cap control are removed):
You have the top cap (with an air-valve)/then you have the IFP chamber/then the actual IFP, separating oil and air/then you have the oil chamber.
Ah that's the mistake I made. Hopefully I can ride them for another week and then send them back
What have you done, then - did you try and rebuild them yourself?!
Yeah 🙄 they seem to work ok at the moment but don't have lockout or rebound controls. I'll send them to pace after the easter hols.
Would have another go at fixing them yourself if you knew how to do it? It would, however, £20-30 or so quid on tools alone.
How do I add air the damper?
You need an IFP valve adaptor. You could use the IFP adaptor that RS make for the Monarch and Vivid shocks < http://www.amazon.co.uk/RockShox-Air-Valve-Adapter-Tool/dp/B00652V9HK>, or you could use the Manitou IFP adaptor (which is better, as it has an in-built non-return valve meaning no air loss when you remove the adapter) < http://www.chainreactioncycles.com/Models.aspx?ModelID=38402>.
You'll also need an adapter to fill the oil chamber - an Avid or Formula bleed hole adapter will work.
So where does the adapter go? in the top of the top cap?