I serviced this hub on my Canyon a few weeks ago. It’s about 18 months old and springs, pawls etc all looked Ok. I cleaned it up and used light wet chain lube; Finish line I think.

It has worked great since in the cold & wet but I was up on Harden Moor last week with the temp about 1-4deg C and found that the freehub would not engage properly; just a bit stiff in rotation with no pawl noise or power transfer to the wheel. It all was back to normal when I go home so can only think it might be some low temperature problem, perhaps due to the viscosity of the lube or metal contraction. It did this once before when below freezing (before recent service) but is usually fine in the cold; all a bit mysterious.

Any one on the STW massive come across this?

possibly water in the freehub freezing or alternatively use a light teflon grease that will be less prone to stiffening in the cold?

Needs a strip clean and re-grease I reckon. As above water in the grease is most likely suspect. Check it sooner that later else you will knacker the pawls if they are not already done.

Happened to mine too recently in the extreme cold. DT Swiss are very adamant you use their correct grease to service their freehubs with (mine needs a service, not done it since I got the wheels) and perhaps this is why.

I had this on the same hub, i just got rid of the excess grease, the cold was making the grease more viscous causing the springs that push the ratchets together to stick, i didnt worry about the dt swiss own brand grease but just only use a very light coating

Cheers all.
So it needs a strip out with a check for water and excess grease, and possibly renew lube with light teflon grease.

Pretty sure I used the Finish Line wet lube:
http://www.chainreactioncycles.com/Models.aspx?ModelID=1041;
so may be go for a lighter lower viscosity type if I can’t easily find the DT Swiss stuff. I’ve got F Line Teflon dry which should work?

Also have Park Polylube, Stendec easyglide waterproof and Finish Teflon grease

Strip down done and still no better so will get the 2 pawl & spring kit from CRC; cheap @7 quid and comes with grease too.
http://www.chainreactioncycles.com/Models.aspx?ModelID=81209

I’m hoping the freehub body is Ok though it looks a bit marked on the inside.
Anyone here know where to get one please?

Pawls do engage better now but ratchet & ring sub-assy slips within the freehub shell! A bit poor really but not the weather at all it would seem….
Anyone seen this? If not; this is a PSA.

Needs a new hub body. I’m told for DT Swiss AM1800 the Onyx/Cerit fits onto 4.7mm needle cage.

http://www.ukbikestore.co.uk/product/58/hbdt869/dt-swiss-onyx-freehub-body-shimano.html
http://www.ukbikestore.co.uk/product/58/hbdt873/dt-swiss-needle-cage-complete-for-rear-onyx–370-hub.html
http://www.ukbikestore.co.uk/product/58/hbdt872/dt-swiss-retainer-spring-for-onyx-hub.html

http://www.dtswiss.com/Resources/Support/HUBS/DT-Swiss-Hubs-Onyx,-Cerit-Technical-Manual

Bump.
Anyone seen this problem?